• September Equinox

    Worldwide

    14:02 HST (04:02 UTC); the Sun rises exactly in east traveling through sky for 12 hours, sets exactly in west; every place on Earth experiences a ~12-hour day.

  • 69th Anniversary: First-Ever Satellite Launched to Space (Sputnik 1)

    Worldwide

    In 1957 the Soviet Union launched the Sputnik 1 mission which became the first artificial Earth satellite and launched humankind into the Space Age. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October. Size and Weight: Orbit Time: Mission: End of Life: It […]

  • International Observe the Moon Night 2026

    Worldwide

    For observation, appreciation, understanding of the Moon / its connection to planetary science / exploration; 1st quarter Moon is best time due to shallow angle of sunlight that illuminates details.

  • Peak of Orionids Meteor Shower

    Worldwide

    Appearing in constellation Orion, Orionids are a Class I shower providing up to 20 per hour, swiftly moving ~66km/sec. With activity spanning October 2 - November 12, other nights might provide good viewing since Moon on the peak night is 80% full.

  • December Solstice

    Worldwide

    10:49 HST (00:49 UTC); the Sun reaches the point where it is farthest South of the celestial equator, marking the shortest day and longest night of the year (opposite in Southern Hemisphere).

  • Yuri’s Night Celebrations

    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 12, 1961, and the inaugural launch of the first Space Shuttle on April 12, 1981. We use space to bring the world together, […]

  • 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’ in 1997 by Lockheed Martin Corp.

  • Islamic New Year 1449 AH

    Worldwide

    New Year 1 Muharram (1st day) to begin at sunset on Jun 6; if young New Moon is not visible the beginning of the month and year may be delayed.

  • Asteroid Day 2027

    Worldwide

    UN-Sanctioned annual, global asteroid awareness program supporting thousands of independently organized events, providing educational resources; held on June 30, the anniversary of the Tunguska event in 1908 when a meteor air burst levelled about 2,150 km² of forest in Siberia, Russia.

  • 70th Anniversary: First-Ever Satellite Launched to Space (Sputnik 1)

    Worldwide

    In 1957 the Soviet Union launched the Sputnik 1 mission which became the first artificial Earth satellite and launched humankind into the Space Age. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October. Size and Weight: Orbit Time: Mission: End of Life: It […]

  • World Space Week

    Worldwide

    Celebrating international contributions of space science for betterment of the human condition; Oct 4 is 70th observation of 1st Space mission Sputnik One launched by Soviet Union 1957; Oct 10 is 60th observation of Outer Space Treaty going into effect 1967.

  • Yuri’s Night Celebrations

    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 12, 1961, and the inaugural launch of the first Space Shuttle on April 12, 1981. We use space to bring the world together, […]

  • 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’ in 1997 by Lockheed Martin Corp.

  • Asteroid Day 2028

    Worldwide

    UN-Sanctioned annual, global asteroid awareness program supporting thousands of independently organized events, providing educational resources; held on June 30, the anniversary of the Tunguska event in 1908 when a meteor air burst levelled about 2,150 km² of forest in Siberia, Russia.

  • 71st Anniversary: First-Ever Satellite Launched to Space (Sputnik 1)

    Worldwide

    In 1957 the Soviet Union launched the Sputnik 1 mission which became the first artificial Earth satellite and launched humankind into the Space Age. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October. Size and Weight: Orbit Time: Mission: End of Life: It […]

  • World Space Week

    Worldwide

    Celebrating international contributions of space science for betterment of the human condition; Oct 4 is 71st observation of 1st Space mission Sputnik One launched by Soviet Union 1957; Oct 10 is 61st observation of Outer Space Treaty going into effect 1967.

  • Yuri’s Night Celebrations

    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 12, 1961, and the inaugural launch of the first Space Shuttle on April 12, 1981. We use space to bring the world together, […]

  • 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’ in 1997 by Lockheed Martin Corp.

  • 72nd Anniversary: First-Ever Satellite Launched to Space (Sputnik 1)

    Worldwide

    In 1957 the Soviet Union launched the Sputnik 1 mission which became the first artificial Earth satellite and launched humankind into the Space Age. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October. Size and Weight: Orbit Time: Mission: End of Life: It […]

  • World Space Week

    Worldwide

    Celebrating international contributions of space science for betterment of the human condition; Oct 4 is 72nd observation of 1st Space mission Sputnik One launched by Soviet Union 1957; Oct 10 is 62nd observation of Outer Space Treaty going into effect 1967.

  • Yuri’s Night Celebrations

    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 12, 1961, and the inaugural launch of the first Space Shuttle on April 12, 1981. We use space to bring the world together, […]

  • 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’ in 1997 by Lockheed Martin Corp.