按月归档: 2 月 2023

恒星TRAPPIST-1的第七颗行星

2023年2月1日 The Seventh World of Trappist-1 Illustration Credit & Copyright: Michael Carroll Explanation: Seven worlds orbit the ultracool dwarf star TRAPPIST-1. A mere 40 light-years away, many of the exoplanets were discovered in 2016 using the Transiting Planets and Planetesimals Small Telescope (TRAPPIST) located in the Atlas Mountains of Morocco, and...

解开星系团的结

天文学家观测到了至少三个星系团之间正在进行的壮观碰撞。来自NASA的钱德拉X射线天文台、ESA(欧洲航天局)的XMM-Newton和三架射电望远镜的数据正在帮助天文学家理清这一混乱场景中发生的事情。像这样的碰撞和合并是星系团成长为今天看到的巨大宇宙大厦的主要方式。这些也是宇宙中最大的粒子加速器。

NASA肯尼迪航天中心的植物群和动物群

In this photo from Oct. 14, 2008, a great blue heron stands watch among a pond of water lilies on NASA’s Kennedy Space Center. It is one of 310 species of birds that inhabit the National Merritt Island Wildlife Refuge, which shares a boundary with Kennedy. The marshes and open water of the refuge also provide wintering areas for 23 species of migratory...