The sky on
your birthday.
Olympus Mons: Largest Volcano in the Solar System
Olympus Mons on Mars is the largest volcano in our Solar System. It is three times taller than Mount Everest, but its slopes are very shallow. This shield volcano formed from fluid lava over a long period. Its vast size covers an area greater than the entire Hawaiian volcano chain.
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Released on your day
Space pictures released on your month and day in other years, or a few days either side. Each one is sharp enough to print as a poster.
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The Sun on your day The Sun on 4 April 2023 See it as a poster -
The Earth on your day The Earth on 4 April 2023 · Nile Delta and Sinai See it as a poster -
Released on 4 April 2014 Iridescent Glory of Nearby Helix Nebula See it as a poster -
Released on 4 April 2019 Messier 2 See it as a poster -
Released on 4 April 2013 Hubble/Chandra/Spitzer composite image of NGC 602, in the “wing” of the Small Magellanic Cloud See it as a poster -
Released on 4 April 2009 Irregular galaxy NGC 55 See it as a poster -
Released on 4 April 2025 Stellar sculptors in NGC 346 See it as a poster
In tropical astrology, 4 APR 2023 falls under Aries (♈). The sign's window runs from 03-21 through 04-19. Aries is the constellation traditionally tied to spring's arrival in the northern hemisphere. The Sun was crossing this region of the sky on 4 APR 2023.
Questions about April 4, 2023
What space photo was released on April 4, 2023?
NASA's Astronomy Picture of the Day for April 4, 2023 was "Olympus Mons: Largest Volcano in the Solar System". It's the card at the top of this page.
What was the Moon's phase on April 4, 2023?
A full moon, about 98% lit.
What day of the week was April 4, 2023?
April 4, 2023 was a Tuesday, day 94 of the 365 days in 2023.
What did the Sun and the Earth look like on April 4, 2023?
NASA's Solar Dynamics Observatory photographed the Sun that day, and NASA's Terra satellite photographed the whole Earth. Both are on this page, next to the card.
Is it free?
Yes. Seeing, sharing and downloading the card is free, and there's no account to make.