Launches
ON RECORD17MISSIONS
16 of them reached orbit. The earliest was 1967, the most recent 2023.
ARCHIVE // DAY OF YEAR
17 orbital launches flew on September 15, the earliest of them in 1967, and 16 reached orbit. Wikipedia records 2 spaceflight and astronomy events on September 15. Below are the pictures NASA published on September 15 in 4 different years — each one taken or released on this exact date.
17MISSIONS
16 of them reached orbit. The earliest was 1967, the most recent 2023.
2ENTRIES
Spaceflight and astronomy entries from Wikipedia's record of this date, oldest first — from 1830 onward.
4IMAGES
NASA's Astronomy Picture of the Day for September 15, one per year. Some are public domain and some belong to the photographer — each says which.
NASA’s Astronomy Picture of the Day, for this calendar date in each of the last several years.

2024
Have you ever seen the Man in the Moon? This common question plays on the ability of humans to see pareidolia -- imagining familiar icons where they don't actually exist. The textured surface of Earth's full Moon is home to numerous identifications of iconic objects, not only in modern western culture but in world folklore throughout history. Examples, typically dependent on the Moon's perceived orientation, include the Woman in the Moon and the Rabbit in the Moon. One facial outline commonly identified as the Man in the Moon starts by imagining the two dark circular areas -- lunar maria -- here just above the Moon's center, to be the eyes. Surprisingly, there actually is a man in this Moon image -- a close look will reveal a real person -- with a telescope -- silhouetted against the Moon. This well-planned image was taken in 2016 in Cadalso de los Vidrios in Madrid, Spain. Observe the Moon Night: NASA Coverage
© Dani Caxete — used with the credit NASA publishes

2023
Venus has returned, now appearing in planet Earth's predawn skies as a brilliant morning star. From a window seat on a flight to Mexico City, the bright celestial beacon was captured just before sunrise in this astronomical snapshot, taken on September 12. Venus, at the upper right, shared the early twilight with an old crescent Moon. Seen from this stratospheric perspective, mountain peaks and clouds appear in silhouette along a glowing eastern horizon. The dramatic, long, low cloud bank was created by ongoing venting from planet Earth's active volcano Popocatépetl.
© Luis Miguel Meade Rodríguez — used with the credit NASA publishes

2022
For northern hemisphere dwellers, September's Full Moon was the Harvest Moon. Reflecting warm hues at sunset it rises over the historic town of Castiglione di Sicilia in this telephoto view from September 9. Famed in festival, story, and song Harvest Moon is just the traditional name of the full moon nearest the autumnal equinox. According to lore the name is a fitting one. Despite the diminishing daylight hours as the growing season drew to a close, farmers could harvest crops by the light of a full moon shining on from dusk to dawn. Harvest Full Moon 2022: Notable Submissions to APOD
© Dario Giannobile — used with the credit NASA publishes

2021
Where on Earth do cyclones go? Usually known as hurricanes when in the Atlantic Ocean and typhoons when in the Pacific, the featured map shows the path of all major storms from 1985 through 2005. The map shows graphically that cyclones usually occur over water, which makes sense since evaporating warm water gives them energy. The map also shows that cyclones never cross -- and rarely approach -- the Earth's equator, since the Coriolis effect goes to zero there, and cyclones need the Coriolis force to circulate. The Coriolis force also causes cyclone paths to arc away from the equator. Although long-term trends remain a topic of research, evidence indicates that hurricanes have become, on the average, more powerful in the North Atlantic over the past 30 years, and their power is projected to keep increasing. Follow APOD on Instagram in: English, Farsi, Indonesian, Persian, or Portuguese
NASA · public domain
1830
The Liverpool to Manchester railway line opens; British MP William Huskisson becomes the first widely reported railway passenger fatality when he is struck and killed by the locomotive Rocket.
Opening of the Liverpool and Manchester Railway ↗1968
The Soviet Zond 5 spaceship is launched, becoming the first spacecraft to fly around the Moon and re-enter the Earth's atmosphere.
Soviet Union ↗Event text and thumbnails come from Wikipedia and are used under CC BY-SA 4.0. Images are drawn only from Wikimedia Commons, which does not accept non-free content — each thumbnail links to its file page, where its licence and author are recorded.
Launch records are from The Space Devs’ Launch Library 2. Pictures are NASA’s Astronomy Picture of the Day; NASA imagery is generally not subject to copyright, but individual APOD entries are frequently the property of the photographer, and each caption says which applies.
General-audience astronomy and spaceflight — none of it a textbook.
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LISTING
Still the best single argument for why any of this matters, and it leaves the arithmetic in. For a reader who wants the science, not just the awe.
LISTING
The case for leaving Earth, written by someone unsentimental about how hard that is. Suits readers who want the argument rather than the poster.
LISTING
Hard-SF problem solving in The Martian's key — for anyone who liked the engineering more than the peril. The only novel on this list.
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