ExoAtlas

ExoAtlas is a web-based space-visualization platform that turns live scientific data from NASA & the IAU Minor Planet Center into tools anyone can use for free.

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Today in 1947, pilot Kenneth Arnold reported the first widely publicized sighting of an unidentified flying object, which he described as flying like a "saucer skipping on water." #UFO

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Happy birthday to astronaut Donn F. Eisele (born 1930), who served as the Command Module Pilot for Apollo 7, the first crewed flight of the Apollo spacecraft. #Apollo7

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On this day in 1978, astronomer James Christy discovered Charon, the largest moon of Pluto. The discovery revealed Pluto to be part of a binary system. #Pluto #Charon

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In 2004, SpaceShipOne completed the first privately funded human spaceflight, a major milestone for commercial space travel. #SpaceShipOne

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Today is the June Solstice, the longest day of the year in the Northern Hemisphere and the official start of summer. ☀️ #Solstice #Summer

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On this day in 2012, the Soyuz TMA-03M spacecraft landed in Kazakhstan, returning astronauts Don Pettit, Oleg Kononenko, and André Kuipers from the ISS. #Soyuz #ISS

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On Aug 12, 2026, the Moon’s shadow sweeps from Iceland to northern Spain. 16 cities fall inside totality. Dozens more hit 90%+ coverage.

Is yours one of them? https://t.co/t2HIf3fmPf

#SolarEclipse #Eclipse2026 #TotalSolarEclipse #Astronomy #Astrophotography

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In 1983, Sally Ride became the first American woman in space, launching with the crew of Space Shuttle Challenger mission STS-7. 🚀 #SallyRide

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On this day in 2009, NASA launched the Lunar Reconnaissance Orbiter (LRO) and the LCROSS probe, beginning a new era of lunar exploration. #LRO #Moon

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In 1963, Valentina Tereshkova became the first woman in space, launching aboard the Vostok 6 capsule for a three-day mission. #ValentinaTereshkova

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Clear skies tonight, or stay in?

ExoAtlas Tonight scores your local observing conditions — cloud cover, Bortle class, and a quick verdict on whether it’s worth setting up.

https://t.co/kw0kvkjU2T

Check it out for Free!

#astrophotography #stargazing #astronomy #nightsky #telescope #bortlescale #astrophotographer #cloudcover #observing #milkyway #deepsky #backyardastronomy

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Today in 2011, a total lunar eclipse was visible over Europe, Africa, Asia, and Australia, one of the longest and darkest of the 21st century. 🌒 #LunarEclipse

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On this day in 1967, the United States launched Mariner 5 on a flyby mission to Venus. #Mariner5 #Venus

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In 1983, the Pioneer 10 spacecraft crossed the orbit of Neptune, becoming the first human-made object to venture beyond the major planets of our solar system. #Pioneer10

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On this day in 1967, the Soviet Union launched the Venera 4 probe. It would become the first spacecraft to transmit data from deep within another planet's atmosphere (Venus). #Venera4

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In 2008, NASA's Fermi Gamma-ray Space Telescope was launched on a mission to study the most extreme environments in the universe. 🌌 #Fermi #GammaRays

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On this day in 2003, just days after its twin, the Mars Exploration Rover Opportunity was launched from Cape Canaveral. 🔴 #Oppy #Mars

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Happy birthday to astronaut and engineer Michael J. Massimino (born 1962), a veteran of two Space Shuttle missions to service the Hubble Space Telescope. 🎂 #Astronaut

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In 2007, the Space Shuttle Atlantis launched on mission STS-117 to deliver a new set of solar arrays to the International Space Station. #SpaceShuttle

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On this day in 2003, NASA launched the Mars Exploration Rover Spirit on its journey to the Red Planet. #SpiritRover #Mars