The above image shows a 20-meter-long chunk of frozen carbon dioxide falling off a cliff. Rising temperatures during the ...

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But to catch the finer surface details, like its polar caps or darker ... the Jan 16 opposition. Mars oppositions are special because they happen roughly every two years. Why?

February stargazing is fantastic for many reasons, but this year there’s a one-two-three punch of bright planets adding to ...

Just east of Betelgeuse is the fine binocular cluster NGC 2244. But the much fainter Rosette Nebula that lies around the ...

Blue Ghost and New Glenn started off the year right. Many more launches are on the way, and many can be watched online.

Alignments of five or more planets are rare—there will be two more featuring five or more planets this year, but after that the next won’t happen until 2040.

Blood Falls in Antarctica flows unpredictably with iron-rich, salty water. Microbes inside survive without sunlight.