Sky & Telescope

Passing Baby Stars Lock Arms in Rare Astronomical Find

Abha Jain — Tue, 30 Dec 2025 16:01:57 +0000

Astronomers have discovered a bridge of gas and dust between two protostars, the signature of a close encounter 15,000 years ago.

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Spaceflight for Astronomy — A Look Back and Ahead

David Dickinson — Mon, 29 Dec 2025 14:00:00 +0000

The highlights of spaceflight in 2025 have included missions to explore the Moon, Mars, and the Sun — and more is coming in the New Year.

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This Week's Sky at a Glance, December 26 – January 4

Alan MacRobert — Fri, 26 Dec 2025 09:52:00 +0000

Jupiter nears opposition. The waxing Moon pairs with Saturn, then guides the way to the fine telescopic double star Gamma Arietis. Later it passes the Pleiades.

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How To Start with Your New Telescope

Alan MacRobert — Thu, 25 Dec 2025 09:35:00 +0000

How to start sky exploring with that new telescope. How to set it up right, other key things to know -- and great cosmic immensities to start finding tonight.

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Did Astronomers See a Star Explode Twice?

Colin Stuart — Tue, 23 Dec 2025 16:00:00 +0000

Astronomers are trying to determine if they've witnessed a complex stellar explosion or a relatively ordinary supernova.

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Explore Orion's Massive New Stars with Binoculars

Bob King — Mon, 22 Dec 2025 17:57:27 +0000

Waves of recent star formation have made Orion winter's most scintillating constellation. You can see how it all came to be.

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This Week's Sky at a Glance, December 19 – 28

Alan MacRobert — Sat, 20 Dec 2025 03:11:00 +0000

We greet the winter solstice. Jupiter nears opposition. Will the two Dog Stars balance for you? And meet the House in the Hyades.

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Glowing Arc by Andromeda Might Be Remnants of a Dying Star

Arielle Frommer — Fri, 19 Dec 2025 19:14:53 +0000

Discovered by amateur astronomers, a mysterious arc of gas might be the ghostly remains of a star shedding its outer layers. However, astronomers haven’t reached a consensus yet.

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New Radar Data Chills Prospects of a Subglacial Lake on Mars

Javier Barbuzano — Wed, 17 Dec 2025 18:01:42 +0000

There could be liquid water trapped under the southern polar cap of Mars. But new observations suggest otherwise.

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Scientists Map the Sun’s Magnetic “Surface”

Colin Stuart — Tue, 16 Dec 2025 18:41:25 +0000

Where does the Sun end and the solar wind begin? Scientists have mapped the dynamic magnetic edge that bounds our star.

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