Without our satellite, Earth’s geology, biology, and climate — even human philosophy — would be vastly different.

On May 1, 1949, astronomer Gerard Kuiper spotted a new moon of Neptune while examining photographic plates from McDonald Observatory’s 82-inch telescope. It would be the last moon discovered at that ...

Saturn, rising early in the morning, has now become a bit easier to spot in the predawn sky. About 45 minutes before sunrise on May 1, it has reached an altitude of nearly 4° above the eastern horizon ...

Venus ends the month of April near a pair of 4th-magnitude stars in Taurus the Bull: Kappa (κ) and Upsilon (υ) Tauri. The bright planet now lies to the upper right of 1st-magnitude Aldebaran, the Bull ...

This week, Astronomy magazine Editor Emeritus Dave Eicher invites you to look to the southeast on the night of May 3 to see the Moon rise alongside Antares, the brightest star in Scorpius. Good luck!

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Astronomers have discovered a new member of a rare and mysterious class of solar system objects known as sednoids — a subset of extreme trans-Neptunian objects (ETNOs) with exceptionally distant, ...

Rising levels of carbon dioxide in our atmosphere aren’t just affecting climate on Earth — they could also make weather in space more dramatic, says new research. A team led by scientists from the ...

Comet 10P/Tempel, also called Tempel 2, is continuing to brighten in the early-morning sky. Rising around midnight and visible until the sky streaks with dawn, two hours before sunrise on April 27 you ...

Trained as a Soviet Air Force pilot from the age of 15 and a 1959 graduate of the Zhukovsky Air Force Academy, Vladimir Komarov piloted Voshkod 1 in 1964 – the first multi-human-passenger space ...

In 1927, a prescient astronomer named Georges Lemaître looked at data showing how galaxies move. He noticed something peculiar – all of them appeared to be speeding away from Earth. Not only that, but ...

Exciting planetary action takes place this month. Venus and Uranus vie for attention and lie close to each other in late April. Jupiter offers a lot to observe through a telescope, particularly events ...