24小时热门版块排行榜    

Znn3bq.jpeg
查看: 736  |  回复: 4
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

ColonelG

新虫 (正式写手)

[交流] Two new Earth-sized exoplanets discovered

Hunting for habitable worlds, NASA’s Kepler space telescope has unveiled two new planets, some 950 light-years away, that are the smallest yet detected, and the closest in size to Earth. In a paper published this week in Nature, scientists from MIT and elsewhere report that the planets — one just about Earth’s size, and the other a bit smaller — likely have rocky compositions, similar to Earth, and orbit a star much like the sun. But that’s where the similarities end.

Compared with Earth’s leisurely 365-day orbit, the new planets practically whiz around their star in a matter of days or weeks. Their tight circuits, closer even than Mercury’s orbit around our sun, make the planets extremely hot — likely too hot to sustain life. While either planet is far from Earth’s twin, scientists say the discovery is a technological milestone.

“For the Kepler space telescope, it’s extremely significant, because it proves we can reach down to Earth’s size,” says co-author Sara Seager, the Ellen Swallow Richards Professor of Planetary Science and Professor of Physics at MIT. “It’s a massive accomplishment just to find anything at all like this.”

The new planets, which orbit the star Kepler 20, are part of a five-planet system, and have been named Kepler 20e and Kepler 20f.

“This will hopefully open the floodgates to discovering more of these Earth-sized and sub-Earth-sized planets,” says co-author Leslie Rogers, a physics graduate student at MIT. “Then we’ll be able to determine some sort of context for how common are habitable Earth-sized planets.”
回复此楼

» 猜你喜欢

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

bai123

荣誉版主 (文坛精英)

大白鲨

优秀版主


小木虫(金币+0.2):抢了个小板凳,给个红包
no one more?
皇家神龙教大将军+神龙鱼族馆鱼塘防务长官=大白鲨
3楼2011-12-21 20:21:03
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 5 个回答

小丁子

木虫 (知名作家)

The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in the so-called habitable zone where liquid water could exist on a planet's surface, but they are the smallest exoplanets ever confirmed around a star like our sun.

做真实的自己,充实精彩快乐每一天!
4楼2011-12-22 13:57:53
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

ColonelG

新虫 (正式写手)

引用回帖:
: Originally posted by 小丁子 at 2011-12-22 13:57:53:
The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in the so-called habitable zone where liquid water could exist on a planet's surface, but they are the smallest exop ...

It's amazing to show us the picture. Thank you.
5楼2011-12-22 14:07:25
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
普通表情 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 085410 273分调剂 +4 X1999 2026-04-09 4/200 2026-04-11 13:05 by pies112
[考研] 材料考研调剂 +17 云木达达 2026-04-11 19/950 2026-04-11 12:43 by sxx1988
[考研] 22408 352分求调剂 +4 努力的夏末 2026-04-09 4/200 2026-04-11 10:42 by maddjdld
[考研] 还有化工二轮调剂的学校吗 5+14 化工人999 2026-04-09 48/2400 2026-04-11 10:27 by 89436494
[考研] 一志愿985机械学硕380求调剂 +5 关关雎鸠10 2026-04-11 5/250 2026-04-11 10:10 by 知念。A
[考研] 301求调剂 +5 XYPLR 2026-04-05 7/350 2026-04-11 10:03 by zhq0425
[考研] 326求调剂 +5 Shansyn 2026-04-10 5/250 2026-04-10 22:23 by 猪会飞
[考研] 289 分105500药学专硕求调剂(找B区学校) +6 白云123456789 2026-04-09 8/400 2026-04-10 21:13 by zhouxiaoyu
[考研] 药学专硕调剂 +6 ? 一路生?花? 2026-04-10 7/350 2026-04-10 21:08 by zhouxiaoyu
[考研] 一志愿0703化学招61最终排名62化学求调剂 +24 招61排名62 2026-04-07 28/1400 2026-04-10 16:15 by yx54321
[考研] 285求调剂 +9 AZMK 2026-04-07 11/550 2026-04-10 15:24 by AZMK
[考研] 337求调剂 +4 Gky09300550, 2026-04-09 4/200 2026-04-09 17:18 by 帕尔马拉特
[考研] 070300化学学硕311分求调剂 +18 梁富贵险中求 2026-04-04 20/1000 2026-04-09 11:18 by 哒哒哒呱呱呱
[考研] 求助071001调剂!!! +7 黄守松 2026-04-05 8/400 2026-04-09 09:07 by 徐良白眉大侠
[考研] 285求调剂 +20 哦呦呼o 2026-04-04 20/1000 2026-04-08 22:23 by yutian743
[考研] 考研求调剂 +4 雯??? 2026-04-08 4/200 2026-04-08 21:44 by 土木硕士招生
[考研] 283求调剂 +19 A child 2026-04-04 19/950 2026-04-08 14:26 by xingguangj
[考研] 331求调剂 +5 张元一 2026-04-07 6/300 2026-04-07 22:13 by hemengdong
[考研] 调剂 +4 mcbbc 2026-04-06 5/250 2026-04-07 12:33 by upczlm1989
[考研] 320求调剂 +3 一样圆 2026-04-04 3/150 2026-04-04 22:29 by 啵啵啵0119
信息提示
请填处理意见