After our Sun becomes a white dwarf and cools completely, what will be left?
Back to Article List From the January 2025 issue Our white dwarf Sun will cool for billions upon billions of ...
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Does a comet’s period change because it loses mass every time it nears the Sun?
Several bright jets spew from the surface of Comet 67P/Churyumov-Gerasimenko as ices on the nucleus turn to gas. This image ...
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Explore the constellation Cassiopeia
Cassiopeia and its distinctive W-shaped asterism rise above the erupting volcano Mount Etna on the island of Sicily, Italy. Credit: ...
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Where is the solar system heading?
Back to Article List The Sun, the planets, and all the other flotsam and jetsam that constitute the solar system ...
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How Artemis will land humans on the Moon
The Starship HLS stands like a giant 1950s science-fiction spaceship in this artist’s concept, spanning 30 feet (9 m) wide ...
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What’s in the sky this month? The Moon occults Mars and the Pleiades, plus Mars reaches opposition
A composite shows the Dec. 7, 2022, occultation of Mars by the Moon. Although the time-lapse image makes it look ...
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How do spacecraft avoid collisions in the asteroid belt?
Back to Article List From the December 2024 issue The main belt located between the orbits of Mars and Jupiter ...
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What happened to the jettisoned Apollo lunar modules?Â
Back to Article List From the December 2024 issue All but one of the Apollo program’s used lunar modules either ...
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The Red Planet lights up a famous star cluster this month
The conjunction of Venus and the Beehive was a beautiful, if not dazzling, sight as seen from the author’s home ...
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The best deep-sky targets in Taurus
NGC 1514 The Crystal Ball Nebula (NGC 1514) was discovered by German-born English astronomer William Herschel in 1790. Credit: Eric ...
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