Launches
ON RECORD24MISSIONS
22 of them succeeded. The earliest was in 1958 and the latest in 2026.
ARCHIVE // DAY OF YEAR
September 23 in spaceflight
24 launches flew on September 23, the earliest of them in 1958, and 22 of them succeeded. Wikipedia lists 1 spaceflight and astronomy event on September 23. Pick another date to see what happened on it.
Recorded events
IN THE RECORD1ENTRY
Spaceflight and astronomy entries from Wikipedia for this date, oldest first, starting in 1846.
Pictures from this date
NONE0IMAGES
There's no Astronomy Picture of the Day we can show for this date.
What happened on September 23
1846
Astronomers Urbain Le Verrier, John Couch Adams and Johann Gottfried Galle collaborate on the discovery of Neptune.
Urbain Le Verrier ↗
Launches on September 23Archive read 2026-11-05. Anything after that isn't listed here.
24 launches
ONLINE
- 2026Long March 8A | SatNet LEO Group 26CASCSUCCESS
- 2025HASTE | JENNARLSUCCESS
- 2015Rokot / Briz-KM | 3 x Strela-3M (Kosmos 2507, Kosmos 2508, Kosmos 2509)VKSSUCCESS
- 2013Long March 4C | Fengyun-3CCASCSUCCESS
- 2011H-IIA 202 | IGS Optical 4MHISUCCESS
- 2009PSLV | Oceansat-2ISROSUCCESS
- 2005Minotaur I | STP-R1OSCSUCCESS
- 2004Kosmos-3M | Strela-3 135 to 136NPSUCCESS
- 1999Atlas IIAS | Echostar VLMTSUCCESS
- 1998Pegasus XL HAPS | Orbcomm-C1 - C8OSCSUCCESS
- 1997Ariane 42L | INTELSAT 803ASASUCCESS
- 1997Kosmos-3M | Parus 89NPSUCCESS
- 1987Soyuz-U2 | Progress 32CCCPSUCCESS
- 1981Kosmos-3M | Taifun-1 14CCCPSUCCESS
- 1980Soyuz U | Zenit-4MT 19CCCPSUCCESS
- 1977Titan 24B | KH-8 49USAFSUCCESS
- 1975Voskhod | Zenit-2M 60CCCPSUCCESS
- 1972Delta 1604 | IMP 7USAFSUCCESS
- 1969Proton | Luna-16aCCCPFAILURE
- 1968Voskhod | Zenit-2M 3CCCPSUCCESS
- 1965Voskhod | Zenit-4 12CCCPSUCCESS
- 1964Atlas SLV-3 Agena D | KH-7 11USAFSUCCESS
- 1963Thor SLV-2A Agena D | KH-4A 2USAFSUCCESS
- 1958Vostok-L 8K72 | Luna-1aCCCPFAILURE
FIELD KIT / LIBRARY
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LISTING
Cosmos, by Carl Sagan
Sagan's tour of the universe and how we came to understand it. It keeps the science in.
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LISTING
Pale Blue Dot, by Carl Sagan
Sagan's case for people leaving Earth one day, and an honest look at how hard that would be.
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LISTING
Project Hail Mary, by Andy Weir
A science-fiction novel from the author of The Martian, built around solving one engineering problem after another.
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LINKS AMAZON.COM
Sources and licences
Event text and thumbnails come from Wikipedia and are used under CC BY-SA 4.0. Images come only from Wikimedia Commons, which doesn't accept non-free content. Each thumbnail links to its file page, which lists its licence and author.
Launch records are from The Space Devs’ Launch Library 2. Pictures are NASA’s Astronomy Picture of the Day. Many of them belong to the photographer or a partner agency, so we only show the ones credited to NASA alone.