Messier 36
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Astronomers have been studying the star cluster Messier 36 for almost four centuries. Yet they still aren’t sure about its […]
Stormier Skies
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Space weather could be especially stormy this year. A forecast issued late last year said the Sun’s current cycle of
Arneb
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Perhaps the most important number that astronomers need to know about a star is its distance. That allows them to
Moon and Regulus
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The Moon and the star Regulus move across the sky together tonight. Regulus is to the upper right of the
Time Dilation II
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If you’re driving up the highway from Dallas to Minneapolis, you might rely on the Global Positioning System to help
Time Dilation
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No two clocks in the universe appear to tick at exactly the same rate. That’s because no two clocks move
Moon and Gemini
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ASTRONAUTS: There’s a chunk there that we can get. That’s a big fragment within this crystalline rock. Take a picture
Clearing the Fog
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The earliest galaxies were a lot busier than their modern-day counterparts. They were giving birth to stars at a much
Redshift
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The most-distant objects we can see are galaxies more than 13 billion light-years away. That means we see them as
Marsquakes
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During its four years of life, the InSight lander recorded more than 1300 “marsquakes.” Most of them were tiny, and