国产三级大片在线观看-国产三级电影-国产三级电影经典在线看-国产三级电影久久久-国产三级电影免费-国产三级电影免费观看

Set as Homepage - Add to Favorites

【?? ?? ??】This weird planet sports a giant tail like a comet

Source：Feature Flash Editor：synthesize Time：2025-07-03 02:29:42

Astronomers have ?? ?? ??accidentally found a planet with a debris trail like a cometthat stretches up to 5.5 million miles in space. 

This strange exoplanet, located 140 light-yearsaway from Earth in the constellation Pegasus, appears to be rapidly falling apart. Its blistering host star is so close, the radiation is effectively melting it down, leaving behind a long tail of dust. 

Scientists say the rocky world, labeled BD+05 4868 Ab, is losing about one Mount Everest's worth of rock material with each orbit. At that rate, it may completely disintegrate in 1 million to 2 million years.

You May Also Like

A team of MIT-led researchers discovered the planet with NASA's TESS mission — short for Transiting Exoplanet Survey Satellite — a probe designed to find new worlds as they pass in front of their host stars. The findingsare published in the Astrophysical Journal Letters.

"We weren't looking for this kind of planet," said Marc Hon, the paper's lead author, in a statement. "I happened to spot this signal that appeared very unusual."

Mashable Light Speed Want more out-of-this world tech, space and science stories? Sign up for Mashable's weekly Light Speed newsletter. By clicking Sign Me Up, you confirm you are 16+ and agree to our Terms of Use and Privacy Policy. Thanks for signing up!
SEE ALSO: A star was wrongly accused of a cosmic crime: devouring its own planet An artist's imagining of the TESS mission in space.A team of MIT-led researchers discovered the planet with NASA's TESS mission — short for Transiting Exoplanet Survey Satellite — a probe designed to find new worlds as they pass in front of their host stars. Credit: NASA illustration

Only three other planets with tails, all discovered more than a decade ago, are known. But this one stands out for the length of its tail and how bright its star is, making it easier to study with powerful telescopes. The research team intends to follow up with James Webb Space Telescopeobservations this summer to study the tail's features and decipher what minerals make up the planet. 

One thing they already know about the tail is that its dust particles are surprisingly large — the size of sand grains. Without this gargantuan tail, scientists may not have known the planet was crumbling. The tail had been blocking some of the star's light after the planet passed in front of it, which caused the star to dim in unexpected ways. Those dimmings were uneven and appeared to change each time the planet zipped by.

"We got lucky with catching it exactly when it's really going away," said Avi Shporer, one of the paper's co-authors, in a statement. "It's like on its last breath."

Exoplanet BD+05 4868 Ab is about the size of Mercuryand wraps around its star once every 30.5 hours — meaning its year is only slightly longer than a day on Earth. That's possible in part because the planet is roughly 20 times closer to its star than Mercury is to the sun. At that distance, the planet’s surface is perhaps 3,000 degrees Fahrenheit and covered in magma. 

Related Stories
  • Scientists haven't found a rocky exoplanet with air. But now they have a plan.
  • These scientists think alien life best explains what Webb just found
  • The best telescopes for gazing at stars and solar eclipses in 2024
  • A star was wrongly accused of a cosmic crime: devouring its own planet
  • The strange new worlds scientists discovered in 2024

The team believes the star has whittled away the planet over billions of years. Its diminutive size means it doesn’t have enough gravity to hold onto its material, thus compounding the effect.

Researchers are now sifting through TESS data, hoping to find more planets with tails like BD+05 4868 Ab. They may have stumbled upon a unique way to directly study the interior composition of a rocky planet. Such work could give astronomers a better understanding of the diversity of other terrestrial planets like Earth in the galaxy.

"Sometimes with the food comes the appetite," Shporer said.

0.1609s , 9846.4140625 kb

Copyright © 2025 Powered by 【?? ?? ??】This weird planet sports a giant tail like a comet,Feature Flash  

Sitemap

Top 主站蜘蛛池模板： 亚洲日韩av无码 | 在线观着免费观看国产黄 | 精品无码久久久久久久久成人 | 成人黄色网站视频色 | 欧美色综合精品视频在线观看 | 性瘾日记qvod | 久久国产综合精品女同 | 久久精品资源 | 国产无遮挡A片又黄又爽漫画 | 欧美亚洲性色影视在线 | 精品一本之道久久久久久无码中文 | 欧美老熟妇乱子伦牲交视频 | 天天日干干夜天干夜 | 99re国产视频 | 欧美日本综合 | 亚洲精品国产一区二区三 | 高辣H文短篇啪啪小说男男 高辣H文黄暴糙汉文H | 91国内外精品自在线播放 | 天天色视频 | 国产成人av无码精品天堂 | 色一情一乱一伦一区二区三区日本 | A片人喾交XXXXX | 久久99国内精品自在现线 | 老妇乱子伦视频国产 | 精品久久久久久水蜜桃 | 三级网站| 亚洲黄色激情视频 | 2024年国产精品**在线观看 | 欧美高清揄拍自拍视频网站 | 成人午夜中文字幕人妻一个人看的www | 国产精品免费无码二区 | 久久精品农村毛片 | 国产91精品一区二区麻豆观看 | 日韩精品一区二区二三区色欲蜜 | 成人午夜精品无码区久久 | 18禁真人抽搐一进一出动态图 | 国产精品无码日韩久久久久 | 精品人妻一区二区三区在线潮喷 | 91欧美激情一区二区三区成人 | 国产美日韩精品一区二区在线观看 | 久久久久99人妻一区二区三区 |