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Betelgeuse's companion star confirmed

October 2025

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BBC Sky at Night Magazine

Century-old mystery solved with direct detection of a binary to the famous variable star

Betelgeuse's companion star confirmed

Betelgeuse is the 10th-brightest star in the night sky, 700 times the size of our Sun, and has fascinated humans for millennia. Now, at last, a 100-year-old mystery has been put to rest with the discovery of what causes it to dim every six years: a binary companion.

المزيد من القصص من BBC Sky at Night Magazine

BBC Sky at Night Magazine

BBC Sky at Night Magazine

How to find a speck in space

New Horizons proves stellar parallax can locate a probe in the vastness, using the light of just two stars

time to read

4 mins

October 2025

BBC Sky at Night Magazine

BBC Sky at Night Magazine

FIRST CONTACT

Seven missions that gave us our first real look at alien worlds

time to read

6 mins

October 2025

BBC Sky at Night Magazine

BBC Sky at Night Magazine

Possible planet found at Alpha Centauri A

If true, it would be the closest exoplanet ever found in a habitable zone

time to read

2 mins

October 2025

BBC Sky at Night Magazine

Get to know lunar rays

A full Moon might bleach the sky and thwart your stargazing, but it's the best time to catch the magnificent lunar rays

time to read

3 mins

October 2025

BBC Sky at Night Magazine

BBC Sky at Night Magazine

JWST decodes the chaos behind paint-splash nebula

A companion star may be sculpting tangled NGC 6072, a rare multipolar planetary nebula

time to read

1 min

October 2025

BBC Sky at Night Magazine

BBC Sky at Night Magazine

INSIDE THE SKY AT NIGHT

September's Sky at Night episode tackled the Hubble constant. George Dransfield considers how some of the cornerstones of science aren't as rock-solid as we thought

time to read

3 mins

October 2025

BBC Sky at Night Magazine

BBC Sky at Night Magazine

Bridge of stray stars revealed

Dark Energy Camera image of galaxy cluster Abell 3667 brings cosmic history into focus

time to read

1 min

October 2025

BBC Sky at Night Magazine

BBC Sky at Night Magazine

Stargazing in the Atacama Desert

Becca Marsh tours Chile's high Atacama Desert - home to some of the darkest skies and most advanced astronomical observatories on the planet - and discovers a stargazing destination like no other

time to read

7 mins

October 2025

BBC Sky at Night Magazine

BBC Sky at Night Magazine

Titan's lakes could form protocells

Study shows conditions are right to create vesicles, key structures in the origin of life

time to read

1 min

October 2025

BBC Sky at Night Magazine

BBC Sky at Night Magazine

Earliest black hole discovered

The supermassive black hole dates from just 500 million years after the Big Bang

time to read

2 mins

October 2025

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