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A weird, super-hot celestial body is breaking records and challenging astronomers’ understanding of the boundary between stars and planets. The object, called WD0032-317B, is a brown dwarf – a type of bright, gaseous ‘protostar’. Brown dwarfs typically have a similar atmospheric composition to Jupiter but are around 13 to 80 times larger. At that mass, these objects begin to fuse hydrogen isotopes in their cores. However, they aren’t quite massive enough to spark the kind of full self-sustaining stellar fusion that powers stars like our Sun – think of smouldering charcoal rather than a lit wood-fired oven.
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ãã®èšäºã¯ All About Space UK ã® Issue 146 çã«æ²èŒãããŠããŸãã
7 æ¥éã® Magzter GOLD ç¡æãã©ã€ã¢ã«ãéå§ããŠãäœåãã®å³éžããããã¬ãã¢ã ã¹ããŒãªãŒã9,000 以äžã®éèªãæ°èã«ã¢ã¯ã»ã¹ããŠãã ããã
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"We knew that this would be a historic comet"
Astronomer David Levy was immortalised for his co-discovery of Comet Shoemaker-Levy 9 â its impact with Jupiter 29 years ago held the world in awe
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CELESTRON STARSENSE EXPLORER DX 102AZ
Innovative technology provides the simplest and quickest solution yet to finding objects to observe, and this instrument will be very popular with beginners
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MOON TOUR - COPERNICUS
Get up close to the âMonarch of the Moonâ
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A HUNGRY BLACK HOLE 'SWITCHES ON' AS ASTRONOMERS WATCH IN SURPRISE
J221951 is one of the most extreme examples yet
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MYSTERIES OF THE UNIVERSE - WHY DOES JUPITER CHANGE COLOUR?
For years, scientists have tried to work out why Jupiterâs bands frequently move and change colour. Now they believe theyâve found the answer
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MARS HELICOPTER PHONES HOME AFTER A 63-DAY SILENCE
Rugged terrain had kept Ingenuity from communicating with its robotic partner, the Perseverance rover
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SIX OF THE BEST SPACE PRANKS
It turns out that the sky isnât the limit when it comes to a good old-fashioned practical joke
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CLIMATES CHANGE IN THE SOLAR SYSTEM
Alongside Earth, our planetary neighbourhood is changing. But not for the betterâŠ
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TIME APPEARED TO MOVE FIVE TIMES SLOWER IN THE FIRST BILLION YEARS AFTER THE BIG BANG
Time dilation, brought about by the relativistic expansion of space, has resulted in the observed slowing of âclocksâ in the early universe
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WHAT CAN WE DO WITH A CAPTURED ASTEROID?
Asteroids could provide us with rare resources