• Tuesday

    — Atlantic Council,
    Online / Washington DC, USA
    A conversation focusing on international space collaboration and commercial space innovation, to explore priorities, partnerships, and long-term visions among top space agencies, space enterprises, and the telecommunication...
    — International Astronautical Federation (IAF),
    Paris, France
    At Newcap Event Center, 3 Quai de Grenelle, 15th arrondissement, near the Eiffel Tower and Porte de Versailles; Includes a Global Networking Forum and Distinguished Service Award...

    Wednesday

    — Meridian International Center,
    Washington DC, USA
    As space becomes increasingly multipolar, commercialized and contested, the need for international cooperation has never been greater. Meridian’s Space Diplomacy Forum: Shared Horizons will convene diplomats, international...
    — SpaceFund,
    Washington DC, USA
    Reception at Florida House, 16:30-18:30 EDT and Industry Gathering at The Pierce School 19:00+ EDT for attendees of SatShow Week, March 23-26, 2026. Reception RSVP at https://www.zeffy.com/en-US/ticketing/florida-space-forum-with-spacefund...
    — Spaceport Norway,
    Oslo, Norway
    Guest is University of Oslo Professor Svein-Erik Hamran, who built RIMFAX, the first radar ever to operate on the surface of another planet. He is now developing...
    — Alba Orbital,
    Glasgow, Scotland
    9th annual conference addressing development of "pico" satellites, providing forum for collaboration among industry and academia. At Glasgow University Union (GUU), 32 University Avenue. Tour of Alba...
    €86 – €130

    Thursday

    — Universities Space Research Association (USRA), Space Policy Institute (SPI) of George Washington University,
    Online / Washington DC, USA
    Annual symposium on Science Priorities, Readiness, and Enterprise Integration, at Holiday Inn on the National Mall, 550 C Street SW, at 13:00-17:30 EDT (07:00-11:30 HST) and online,...
    — Lunar Surface Innovation Consortium (LSIC), Johns Hopkins University Applied Physics Lab (JHU-APL),
    Online
    LSIC Surface Power Focus Group online discussion of dust-toleration connectors for lunar surface applications. Jorge Núñez, from Johns Hopkins Applied Physics Laboratory (JHU-APL), will present an overview...
    — International Academy of Astronautics (IAA),
    Paris, France
    The Moon naturally shields electromagnetic waves generated by human activities on Earth and around it, results in a silence zone on and above its Farside, called Shielded...

    Friday

    — British Interplanetary Society (BIS),
    London, United Kingdom
    17:30 UT, in person and online, this event brings together leading women from across the space industry to explore the milestones shaped by women and the pathways...
    — American Institute of Aeronautics and Astronautics (AIAA),
    Houston TX, USA
    Research papers are presented in a formal technical meeting atmosphere, and ideas are exchanged and programs discussed. Cash prizes given for 1st, 2nd and 3rd place papers...

    Saturday

    — Kennedy Space Center Visitor Complex,
    Kennedy Space Center Visitor Complex FL, USA
    A never-before-seen Artemis experience on the bottom floor of Space Shuttle Atlantis. This exclusive exhibition immerses you in the story, scale and ambition of Artemis II.  Created...

    Sunday

    — American Astronautical Society (AAS),
    Online
    Convening July 26-30 at Hilton Whistler Resort & Spa in Whistler, British Columbia, Canada, the conference welcomes technical papers spanning all areas of astrodynamics and space-flight mechanics...

    Monday

    — SpaceX,
    SLC-4E (~35°N), Vandenberg SFB CA, USA
    Launch window 03:20-04:17 PDT | 00:20-01:17 HST | 10:20-11:17 UTC for dozens of small microsatellites and nanosatellites for commercial and government customers to sun-synchronous orbit
    — International Space University (ISU),
    Washington DC, USA
    Washington DC-area US Alumni Association features Marcella Kneppers and Bastiaan van den Berg. Kneppers is Kingdom of the Netherlands Senior Advisor for Innovation, Science, and Technology at...
    — Space Pioneer,
    Jiuquan Space Launch Center, ~41°N, Gansu, China
    Launch window 19:00-21:14 China Time | 01:00-03:14 HST | 11:00-13:14 UTC by Space Pioneer of Beijing, a private launch company founded in 2015 by Kang Yonglai. Tianlong-2...
    — UzCosmos National Space Agency of Uzbekistan,
    Tashkent, Uzbekistan
    5th annual event, expecting 500+ attendees and 40+ speakers, discussing space and satellite business among space agencies and industry. At InterContinental Hotel, 2 Shakhrisabz Street in Trilliant...
    £995 – £1195

    Tuesday

    — Commercial Space Federation (CSF), SpaceNews,
    Online
    A conversation on the energy and computing needs driving the push toward orbital data centers. No cost, registration required. With Star Catcher CEO Andrew Rush, and Foundation...
    — American University in Dubai (AUD), United Arab Emirates Space Agency (UAESA),
    Dubai, United Arab Emirates
    At campus of the American University in Dubai (AUD), 15:00-18:00 UTC+4, organized by Armen V. Papazian, Visiting Professor of Space Economics to share United Arab Emirates' vision...
  • Wednesday

    — National Aeronautics and Space Administration (NASA),
    Low Earth Orbit (LEO)
    For U.S. spacewalk 95, planned for April, two NASA Astronauts (yet to be named) will prepare the station’s 3B power channel for a future solar array installation....
    — National Aeronautics and Space Administration (NASA),
    SLC-39B, ~29°N, Kennedy Space Center FL, USA
    Launch window 18:24-20:24 EDT | 22:24 UTC | 12:24 HST for crew of 4 in Orion spacecraft on around-the-Moon flight to last 9-10 days; 3 USA and...
    — National Aeronautics and Space Administration (NASA),
    Nationwide USA
    Commemorations occur today in honor of 1st ever NASA Space Shuttle Columbia carrying John Young and pilot Robert Crippen around Earth on 54.5-hour mission in 1981.
    — Landspace,
    Jiuquan Space Launch Center, ~41°N, Gansu, China
    2nd orbital launch, attempt for booster recovery, by commercial launch firm Landspace of China; follows successful 1st orbital launch of Zhuque-3 stainless steel methalox rocket
    — Space Faculty, Crimson Education,
    Online
    Majoring in STEM is popular among Singapore students, but university admissions do not evaluate all applicants equally! Join Crimson Education & Space Faculty Singapore for advice. 19:00...
    — Centre National D’études Spatiales (CNES), European Space Agency (ESA),
    Bordeaux, France
    Winners of the local hackathons will compete for international semi-finals and finals. This event takes place every two years and is currently preparing its 6th edition. Last...

    Thursday

    — Full Moon,
    Moon Orbit
    02:12 UTC (14:12 HT)
    — National Aeronautics and Space Administration (NASA),
    Online
    NASA Postdoctoral Program offers US and international scientists the opportunity to advance their research while contributing to NASA’s scientific goals. The NPP supports fundamental science; explores the...
    — RKK Energiya,
    Baikonur Cosmodrome, ~46°N, Kazakhstan
    Launch scheduled for 16:00 Kazakhstan Time | 01:00 HST | 11:00 UTC for new launch vehicle, Soyuz-5, called "Irtysh", that can take 34,000 kg to LEO.
    — SpaceX,
    SLC-4E (~35°N), Vandenberg SFB CA, USA
    Launch window 17:03-21:03 PDT | 13:03-17:03 HST | 23:03 Apr 2 - 03:03 Apr 3 UTC for 25 internet satellites to LEO.

    Friday

    — Kennedy Space Center Visitor Complex,
    Kennedy Space Center Visitor Complex FL, USA
    Yuri’s Night joins Kennedy Under the Stars to host the official East Coast flagship event, 18:00 EDT (entry at 17:00). Yuriʻs Night honors the first human in...
    US$65

    Saturday

    — Comet C / 2026 A1 (MAPS),
    Deep Space
    Predicted date for the comet to make a close pass by the Sun (perihelion), potentially triggering a sudden brightening and dramatic tail. If it survives the encounter,...

    Sunday

    — Kennedy Space Center Visitor Complex,
    Kennedy Space Center Visitor Complex FL, USA
    NASA Astronaut and scientist, he flew on Space Shuttle Columbia for STS-83 and STS-94, flew on 5 Spacelab flights, led research on semiconductor material, and was founding...

    Monday

    — American Institute of Aeronautics and Astronautics (AIAA),
    Online
    Through May 13; Don Edberg -- Professor of Aerospace Engineering, Cal Poly Pomona; Adjunct Lecturer, Astronautical Engineering, University of Southern California (USC); Former Boeing Technical Fellow --...
    US$695 – US$1595
    — Embry-Riddle Aeronautical University, Nanjing University of Aeronautics & Astronautics,
    Tokyo, Japan
    A dynamic platform for professionals, engineers, academics, and industry leaders to share knowledge, present groundbreaking research, and explore the latest advancements in aerospace engineering. Chairperson is Koichi...

    Tuesday

    — China Aerospace Science and Technology Corporation (CASC),
    Wenchang Space Launch Center, ~19°N, Hainan Island, China
    Launch window 21:30-21:47 China Time | 03:30-03:47 HST for 9th launch from Commercial LC-1, 59th launch from Wenchang. Long March 8 can take up to 5000 kg...
    — Northrop Grumman (NG),
    SLC-8 (~35°N), Vandenberg SFB CA, USA
    Launch window 07:30-12:30 PDT | 01:30-06:30 HST for an ESPA class satellite based on the Aegis Aerospace M-1 satellite bus used on the STPSat-4 mission for hosting...
    — National Aeronautics and Space Administration (NASA), Association of Spaceflight Professionals (ASP),
    Online
    HRP IWS is the primary venue for reporting progress and results from HRP-funded research and technology tasks to Program Management, with the additional benefit of permitting cross-discipline...
    — International Academy of Astronautics (IAA),
    Madrid, Spain
    The foremost purpose of Space Situational Awareness (SSA) is to provide decision-making processes with a quantifiable and timely body of evidence (predictive/imminent/forensic) of behavior(s) attributable to specific...

    Wednesday

    — SpaceX,
    SLC-40 (~28°N), Cape Canaveral SFS FL, USA
    Set for 08:51 EDT (02:51 HST), 24th flight of Orbital ATK uncrewed supply craft and 23rd to ISS under Commercial Resupply Services contract with NASA; booster will...

    Thursday

    — American Institute of Aeronautics and Astronautics (AIAA),
    Online
    Through May 14, this course will demystify the space weather topic, new to many people, as it affects a wide variety of space systems. The course will...
    US$1595 – US$1795
    — Lunar Surface Innovation Consortium (LSIC), Johns Hopkins University Applied Physics Lab (JHU-APL),
    Online
    Bri DeMattia (NASA Glenn Research Center) will present the work of NASA’s Safe, Innovative, Interoperable Modular Power for Lunar Exploration (SIIMPLE) team. At 11:00 EDT | 15:00...
    — American Institute of Aeronautics and Astronautics (AIAA) San Francisco Section,
    Mountain View CA, USA
    At Ludwig's Biergarten, 383 Castro St, Mountain View, CA 94041, Apr. 9, 2026, 5 - 6:30pm
    — China Aerospace Science and Technology Corporation (CASC),
    Taiyuan Satellite Launch Center (TSLC), ~39°N, Shanxi, China
    Launch window 03:35-03:46 China Time April 9 | 09:35-09:46 HST April 8 for the 23rd launch from Launch Complex 9A, and 153rd launch from Taiyuan Satellite Launch...
    — SpaceX,
    SLC-4E (~35°N), Vandenberg SFB CA, USA
    Launch window 22:39 April 9 - 02:39 April 10 PDT | 16:39-20:39 April 9 HST for 25 internet satellites; Booster B1063 to land on ASDS OCISLY after...

    Friday

    With guest Arnt-Børre Salberg of the Norwegian Computing Center, partner with ESA for THOR Earth observation, a shared platform available to anyone with basic Python skills. At...
    — Hawai'i, USA,
    Statewide Hawai’i, USA
    Recognized proclamation to celebrate the first-ever imaged black hole M87* by Event Horizon Telescope collaboration involving Mauna Kea Observatories, given the Hawaiian name Pōwehi; imaged in April 2017 and...
    — Robinson Planetarium,
    Adrian MI, USA
    In honor of Astronomy Month, celebrated around the Earth, this full-dome planetarium program takes the audience out to the colorful birthplaces and burial grounds of stars, and...
    — Space Generation Advisory Council (SGAC),
    Colorado Springs CO, USA
    Held annually in conjunction with the Space Symposium, SGFF is a multi-day, high-intensity, fast-paced professional development and networking event focused on the global space industry. Students and...

    Saturday

    — The SpaceKind Foundation, Griffith Observatory,
    Los Angeles CA, USA
    No-cost, all-day, family-friendly event at Griffith Observatory featuring Astronauts Jannicke Mikkelsen and Ron Garan. A special ticketed feature presentation is at 7pm followed by a VIP reception...
    — Oklahoma Space Alliance,
    Norman OK, USA
    14:00 CDT at Cyber Hall, 914 W Main St, opposite Norman High School; prospective members are welcome. Agenda: Introductions and review of Space events this past month;...

    Sunday

    — Yuri's Night,
    Worldwide
    Launching parties around the world every year on or around April 12th, in commemoration of Yuri Gagarin becoming the first human to venture into space on April...
    — SpaceX,
    SLC-40 (~28°N), Cape Canaveral SFS FL, USA
    Launch window 02:57 - 06:57 EDT | 20:57 Apr 11 - 00:57 Apr 12 HST for 29 internet satellites; Booster 1080 expected to land on ASDS JRTI...
    — American Institute of Aeronautics and Astronautics (AIAA),
    College Park MD, USA
    Research papers are presented in a formal technical meeting atmosphere, and ideas are exchanged and programs discussed. Cash prizes given for 1st, 2nd and 3rd place papers...

    Monday

    — Lunar Surface Innovation Consortium (LSIC), Johns Hopkins University Applied Physics Lab (JHU-APL),
    Online
    23:59 EDT | 03:59 UTC April 14. No cost for Online attendance; US$150-220 for in-person (Laurel MD, USA). Theme Accelerate the Pace: Touch Down, Power Up, and...
    US$1 – US$220
    — American Society of Civil Engineers (ASCE), Texas A&M University,
    College Station TX, USA
    20th International Conference on Engineering, Science, Construction and Operations in Challenging Environments: ASCE Earth & Space 2026
    — Space Foundation,
    Colorado Springs CO, USA
    Theme: Building Capacity Through Innovation and Collaboration. Expecting 10,000+ registrants, 247 exhibitors, 24 space agencies, 1500+ organizations. At The Broadmoor Hotel & Cheyenne Mountain Resort. Access to...
    Free
    — Space Faculty,
    Singapore
    For undergraduates in STEM-related courses. At Singapore Institute of Technology (SIT)
    — United Nations Office of Outer Space Affairs (UNOOSA),
    Vienna, Austria
    65th session of the UN COPUOS Legal Subcommittee (LSC). Informal meetings and consultations are expected to take place on April 13-14 and April 23-24, surrounding the main...

    Tuesday

    — CAS Space subsidiary of Chinese Academy of Sciences,
    Jiuquan Space Launch Center, ~41°N, Gansu, China
    Scheduled for Noon-12:15 China Time | 04:00 UTC | 18:00 HST April 13, rescheduled from Dec 2025; Kinetica is a solid-propellant 4-stage light launch vehicle, 30m tall...
    — SpaceX,
    SLC-40 (~28°N), Cape Canaveral SFS FL, USA
    Launch window 02:13-06:13 EDT | 20:13 Apr 13 - 00:13 Apr 14 HST, for 29 internet satellites. Booster B1080 planned to land on ASDS JRTI after this...
    — SpaceX,
    SLC-4E (~35°N), Vandenberg SFB CA, USA
    Launch window 19:00-23:00 PDT | 16:00-20:00 HST, for 25 internet satellites. Booster B1082 expected to land on ASDS OCISLY after this 21st flight.
    — American Institute of Aeronautics and Astronautics (AIAA),
    Online
    With Tim Lieuwen of Georgia Institute of Technology, 13:00-14:00 EDT | 07:00-08:00 HST, spanning from fundamentals to current applications and unsolved problems at the intersection of combustion,...
    — California Polytechnic State University (Cal Poly),
    San Luis Obispo CA, USA
    At Cal Poly campus building number 06, Performing Arts Center (PAC). Workshop sessions include: Core Hardware / Mechanisms, Radiation & Reliability, Comm Systems, Payloads, Deployment, Software /...
    US$100 – US$700
    — Integrated Communications, Navigations and Surveillance (ICNS), National Aeronautics and Space Administration (NASA), American Institute of Aeronautics and Astronautics (AIAA),
    Washington DC, USA
    Addressing technology and policy advances in CNS research, development and implementation programs, and policies related to CNS/ATM capabilities and applications. Includes a workshop on interaction between launches...
    US$550

    Wednesday

    — National Aeronautics and Space Administration (NASA),
    Edwards CA, USA
    At NASA Armstrong flight Research Center, for companies, government agencies and organization to explore collaboration opportunities in advanced research and technology development with NASA. 08:00-16:00 PDT on...
    — Johns Hopkins University Applied Physics Lab (JHU-APL), American Institute of Aeronautics and Astronautics (AIAA),
    Laurel MD, USA
    AIAA secret / NOFORN event covering the strategic, programmatic, and technical topics and policy issues pertaining to the aerospace and defense community.

    Thursday

    — American Institute of Aeronautics and Astronautics (AIAA),
    Wichita KS, USA
    Applied Aerodynamics, Aircraft Design, Design Engineering and Flight Test Technical Committees of AIAA all pitch in to call forth enthusiastic creativity from the next generation. College-student teams...

    Friday

    — China Aerospace Science and Technology Corporation (CASC),
    Jiuquan Space Launch Center, ~41°N, Gansu, China
    Launch window 12:10-12:24 China Time | 18:10-18:24 Apr 16 HST of 2-stage rocket used for taking satellites to LEO and SSO. This would be the 97th successful...
    — Robinson Planetarium,
    Adrian MI, USA
    In honor of Astronomy Month, celebrated around the Earth, this full-dome planetarium program takes the audience out to the colorful birthplaces and burial grounds of stars, and...

    Saturday

    — SpaceX,
    SLC-4E (~35°N), Vandenberg SFB CA, USA
    Launch window 07:00-11:00 PDT | 04:00-08:00 HST for 25 internet satellites. Booster B1097 expected to land on ASDS OCISLY after this 8th flight.

    Sunday

    — Blue Origin,
    SLC-36A, Cape Canaveral SFS FL, ~28°N, USA
    Launch window 06:45-09:43 EDT | 00:45-03:43 HST for one AST Space Mobile satellite for cellular broadband, which features ~223-square-meter communications array making it the largest commercial deployment...
    — The Planetary Society,
    Washington DC, USA
    Annual advocacy event that connects space advocates with their members of Congress in Washington D.C. Training 13:00-17:00 Sunday Apr 19. Congressional meetings Monday Apr 20. Anyone age...
    US$30 – US$54

    Monday

    — SpaceX,
    SLC-40 (~28°N), Cape Canaveral SFS FL, USA
    Launch window open 02:48-04:05 EST | HST is 20:48-22:05 on Apr 19; 10th of 10 navigation satellites to MEO; 1st stage booster planned to land on autonomous...
    — National Aeronautics and Space Administration (NASA), United Launch Alliance (ULA),
    New Orleans LA, USA
    Top four-fifths of the Space Launch System (SLS) core stage will be moved from NASA Michoud Assembly Facility to load on a barge for delivery to Kennedy...
    — International Academy of Astronautics (IAA), Italian Space Agency (ASI),
    Montecatini, Italy
    A platform for a fruitful discussion of fundamental problems and practical issues, exchange of research results and ideas in space biology and medicine, including: – Analogue Environments...
    €100 – €700
    — Kavli Institute for Cosmology,
    Cambridge, United Kingdom
    A meeting revisiting the Hubble Sequence 100 years on: Linking the morphological evolution of galaxies across cosmic time. Invited Speakers: Angela Adamo (Stockholm University) Oscar Agertz (Lund University) Michele Cappellari (University of Oxford) Andrei...

    Tuesday

    — SpaceX,
    SLC-4E (~35°N), Vandenberg SFB CA, USA
    Launch window open 13:00-17:00 PDT | 16:00-20:00 HST for 25 internet satellites. Booster B1100 planned to land on ASDS OCISLY after this 5th flight. This is the...
    — Rocket Lab,
    SLC-2, Wallops Flight Facility WA, ~38°N, USA
    Launch window 20:00 Apr 21 - 01:00 Apr 22 EDT | 14:00-19:00 HST for sub-orbital Hypersonic Accelerator Suborbital Test Electron (HASTE) test program of Rocket Lab, using...
    — American Institute of Aeronautics and Astronautics (AIAA) Los Angeles Section,
    Lomita CA, USA
    Origins, Development, Operation and Lessons Learned from NASA's James Webb Space Telescope with Jonathan Arenberg, Northrop Grumman Fellow and Chief Mission Architect for Science and Robotic Exploration,...
    — Comet C/1861 G1 (Thatcher),
    Worldwide
    Best seen from Northern Hemisphere, with a lower hourly rate in the Southern Hemisphere, Lyrids seem to stream from the Constellation Lyra. They actually derive from the...
    — Lunar and Planetary Institute (LPI), Universities Space Research Association (USRA),
    Baltimore MD, USA
    MEPAG Hybrid Meeting #43, online and in Baltimore at Johns Hopkins at Mt Washington, Susquehanna Room, 6225 Smith Avenue. No charge but registration required.

    Wednesday

    — Earthlight Foundation,
    Online
    Exploring the intersection of space innovation and planetary stewardship, from 12:00-14:00 EDT / UTC-4; no cost but registration required at https://docs.google.com/forms/d/e/1FAIpQLSd2yLblO6EqWkVLaCtst5oMSbSdwDAq3_WiuUW5fMOwStqb2Q/viewform
    — International Astronautical Federation (IAF),
    Online
    Moderator Elizabeth Barrios of Blue Origin welcomes panelists from ArianeGroup, DGLR, Sapienza University of Rome, Women in Aerospace, and CSEM at 15:00-16:00 CEST | 13:00-14:00 UTC |...
    — Johns Hopkins University Applied Physics Lab (JHU-APL),
    Laurel MD, USA
    The goal of this workshop is to bring together interdisciplinary scientists to discuss outstanding science questions about Io -- the most volcanically active world in the Solar...
    — Solar System Exploration Research Virtual Institute (SSERVI), National Aeronautics and Space Administration (NASA),
    Online
    This online-only Lunar Surface Science Workshop (LSSW), each day 11:00-17:00 EDT | 15:00-21:00 UTC | 05:00-11:00 HST, will share results from the first NASA CLPS missions, provide...

    Thursday

    — Rocket Lab,
    Launch Complex 1, ~39°S, Mahia Peninsula, New Zealand
    Launch set for 15:09 New Zealand Standard Time | 03:00 UTC | 17:09 Apr 22 HST, for sending 8 separate spacecraft to SSO, including ones for education,...
    — Kennedy Space Center Visitor Complex,
    Kennedy Space Center Visitor Complex FL, USA
    Exclusive all-day tour begins at 09:00 EDT with a knowledgeable space expert as guide. Includes: Admission and parking, iconic attractions including Rocket Garden, Deep Space Launch Complex, Space Shuttle Atlantis, Spaceport KSC ride,...
    US$175

    Friday

    — China Aerospace Science and Technology Corporation (CASC),
    Xichang Satellite Launch Center, ~28°N, Sichuan, China
    Launch window 14:30-14:51 China Time | 06:30-06:51 UTC | HST is 20:30-20:51 on April 23. Chang Zhen 2D (CZ-2D) is expected to make its 103rd flight, powered...
    — National Aeronautics and Space Administration (NASA),
    Low Earth Orbit (LEO)
    NASA spacecraft with 2.4-meter diameter main telescope begins 37th year in space today, launched Apr 24, 1990; could continue operations until 2040s.
    — China National Space Administration (CNSA),
    China (Zhongguo)
    Commemorating the launch of China’s first satellite, Dongfanghong-1 on April 24, 1970.
    — Robinson Planetarium,
    Adrian MI, USA
    In honor of Astronomy Month, celebrated around the Earth, this full-dome planetarium program takes the audience out to the colorful birthplaces and burial grounds of stars, and...

    Saturday

    — Agency for Defense Development (ADD) of South Korea,
    Sea Launch
    Launch window open 14:00-18:00 Korea Time | 05:00-09:00 UTC | HST is 19:00-23:00 on Apr 24; to LEO for first orbital full-version launch after 2 sub-orbital tests...
    — SpaceX,
    SLC-4E (~35°N), Vandenberg SFB CA, USA
    Launch window 07:00-11:00 PDT | 04:00-08:00 HST for 25 internet satellites to LEO. First stage B1088 planned to land on ASDS OCISLY after this 15th flight.
    — United Launch Alliance (ULA),
    SLC-41 (~28°N), Cape Canaveral SFS FL, USA
    First test after ULA Vulcan rocket launching from Florida on February 12, 2026, took a spacecraft to GSO but suffered an anomaly in one of the four...
    — Astronaut Scholarship Foundation (ASF),
    Daytona Beach FL, USA
    Art competition to encourage future STEM (science, technology, engineering, mathematics) leaders, judged by Astronaut Nicole Stott and others, has been on display and judged, and awardees will...

    Sunday

    — Roscosmos State Corporation,
    Baikonur Cosmodrome, ~46°N, Kazakhstan
    Resupply mission to ISS set for 03:21 Baikonur Time UTC+5 | 22:21 UTC Apr 25| 12:21 HST Apr 25; with ~7,280 kg of cargo; after ~2 days,...

    Monday

    — ISS Partners (NASA, Roscosmos, JAXA, ESA and CSA-ASC),
    Low Earth Orbit (LEO)
    Expected 2 days after launch from Kazakhstan, arriving ~22:21 UTC with ~7,280 kg of cargo.
    — United Launch Alliance (ULA),
    SLC-41 (~28°N), Cape Canaveral SFS FL, USA
    Launch window 20:52-21:21 EDT | 14:52-15:21 HST | UTC April 28 00:52-01:21, for 29 satellites to Low Earth Orbit for Amazon Leo internet system. Constellation planned to...
    — SpaceX,
    SLC-39A, ~29°N, Kennedy Space Center FL, USA
    Launch window 10:21-11:46 EDT | 04:21-05:46 HST | 14:21-15:46 UTC for first Falcon Heavy launch since 2024, sending to Geostationary Transfer Orbit 3 Ka-band satellites offering 1-terabit-per-second...
    — Sophia Centre for the Study of Cosmology in Culture, University of Wales Trinity Saint David, Yildiz Technical University,
    Istanbul, Türkiye
    Planned topics include star and constellation myth and imagery; modern and ancient astronomy of China, India, Central Asia, West Asia, North Africa, the Eastern Mediterranean and Europe.
    — American Nuclear Society (ANS),
    Dayton OH, USA
    Speakers include Bhavya Lal and Clive Neal, to bring together visionary engineers building the hardware, policymakers writing the standards, and agency leaders deploying the capital. When NASA,...

    Tuesday

    — Arianespace,
    Launch Area 4, ~5°N, Guiana Space Centre, French Guiana
    Launch window 05:51-06:39 French Guiana Time | 08:51-09:39 UTC | HST April 17 22:51-23:39, to carry 32 satellites to Low Earth Orbit for broadband internet, part of...
    — China National Space Administration (CNSA),
    Wenchang Space Launch Center, ~19°N, Hainan Island, China
    Flight hazard notices were filed for a launch between April 28 and 30. This first Long March 10B vehicle has had a successful wet dress rehearsal and...
    — Space Rising,
    Phoenix AZ, USA
    From 09:30-15:00 MST for an "immersive, limited-capacity session" for Arizona Space Congress delegates, deploying a real-world simulation of strategic decision-making for the emerging space economy. At Defense...
    — World Innovation Network, Space Rising,
    Phoenix AZ, USA
    Space Tank hope to ignite innovation in space by having entrepreneurs / inventors / designers / engineers describe their start-up business, for the purpose of receiving support...
    $125
    — Lunar Surface Innovation Consortium (LSIC), Johns Hopkins University Applied Physics Lab (JHU-APL),
    Online / Washington DC, USA
    Theme Accelerate the Pace: Touch Down, Power Up, and Explore! focuses on urgency for lunar infrastructure technology efforts, inviting discussions on how we can accelerate progress together....
    Free – US$220

    Wednesday

    — SpaceX,
    SLC-4E (~35°N), Vandenberg SFB CA, USA
    Launch window 19:00-23:00 PDT | 16:00-20:00 HST for 25 internet satellites to LEO. First stage booster B1071 expected to land on ASDS barge OCISLY in the Pacific...
    — Spaceport Norway,
    Oslo, Norway
    Arnt-Børre Salberg is the guest at 17:00-20:00, Mesh Youngstorget, Møllergata 6, Oslo. He and his team have built THOR since he gave a talk on artificial intelligence...
    — National Aeronautics and Space Administration (NASA),
    Online
    "Learning from Experiences, Achievements, and Resolution Navigation" -- Representatives from multiple NASA centers and outside organizations meet to advance NASA goals via networking, information exchange, and collaborative...

    Thursday

    — American Institute of Aeronautics and Astronautics (AIAA), American Institute of Aeronautics and Astronautics (AIAA) Los Angeles Section,
    Online
    Co-Hosted by The AIAA Gravity Dependent Science and Technology Technical Committee (GDST-TC), formerly the Microgravity Space Processes Technical Committee (MSP-TC). Natasha Tsakos shares the story of Space Wonders:...
    — SpaceNews,
    Washington DC, USA
    Conversations with industry and government leaders on building, powering and managing data infrastructure in space followed by a networking reception. 15:00-19:00 EDT. With FCC Space Bureau Chief...
  • Friday

    — International Space Day,
    Worldwide
    First Friday in May, events and presentations to promote STEM education and inspire people to continue the work of Space explorers; originally began as ‘National Space Day’...
    — Full Moon,
    Moon Orbit
    17:24 UTC (07:24 HST).
    — SpaceX,
    SLC-40 (~28°N), Cape Canaveral SFS FL, USA
    Launch window 13:33-17:33 PDT | 07:33-11:33 HST for 29 internet satellites to LEO. First stage B1069 expected to land on ASDS ASOG after this 31st flight.

    Saturday

    — Maunakea Observatories (MKO), University of Hawai'i Institute for Astronomy,
    Hilo HI, USA
    Family-friendly free event, 10:00-16:00 HST at Prince Kūhiō Plaza shopping center, to educate and entertain about astronomy and space, with >30 organizations hoping to inspire next-generation science...