The sky on
your birthday.
Comet ATLAS over Brasília
Comet C/2024 G3 (ATLAS) shows an impressive tail over Brasília, Brazil. The comet rounded the Sun well inside Mercury's orbit, causing concern that it might break up, and there is recent evidence it did. Near its closest approach to the Sun, the comet was so bright it was reportedly visible during the day.
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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 21 January 2025 See it as a poster -
The Earth on your day The Earth on 21 January 2025 · Eye of the Sahara, Mauritania See it as a poster -
Released on 21 January 2016 Hubble Unveils a Tapestry of Dazzling Diamond-Like Stars See it as a poster -
Released on 21 January 2016 Dazzling diamonds of Trumpler 14 See it as a poster -
Released on 21 January 2004 Empty Nest See it as a poster -
Released on 21 January 2025 The city lights of Lima, Peru See it as a poster -
Released on 21 January 2025 The city lights of Buenos Aires, Argentina See it as a poster
In tropical astrology, 21 JAN 2025 falls under Aquarius (♒). The sign's window runs from 01-20 through 02-18. Aquarius is home to the Helix Nebula, the closest planetary nebula to Earth. The Sun was crossing this region of the sky on 21 JAN 2025.
Questions about January 21, 2025
What space photo was released on January 21, 2025?
NASA's Astronomy Picture of the Day for January 21, 2025 was "Comet ATLAS over Brasília". It's the card at the top of this page.
What was the Moon's phase on January 21, 2025?
A last quarter moon, about 54% lit.
What day of the week was January 21, 2025?
January 21, 2025 was a Tuesday, day 21 of the 365 days in 2025.
What did the Sun and the Earth look like on January 21, 2025?
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.