
Pathfinder on Mars
2026-07-04
On July 4th, 1997, using its own array of fireworks, a parachute, and a cocoon of airbags, the Mars Pathfinder spacecraft bounced like a giant beach ball at least 15 times before it came to rest on the surface of Mars at 10:07 AM Pacific Daylight Time. After its then novel airbag-assisted landing sequence was completed, Pathfinder transmitted this color mosaic to mission operators on Earth. In the scene from another world, the Mars Sojourner robot rover is visible in the foreground, crouched on top of the unfolded Pathfinder. About the size of a large house cat, the six-wheeled, solar-powered Sojourner became the first successful Martian rover. Surrounding Pathfinder are deflated airbags and the rock-strewn terrain of the Ares Vallis floodplain. In the distance Martian hills appear against a dusty brownish sky. The Pathfinder lander was subsequently renamed the Carl Sagan Memorial Station.
via NASA APOD
(121514) 1999 UJ7 是一顆很小的小行星,它的位置靠近火星軌道的L4 (在火星軌道前方60度)。在2011年9月,(121514) 1999 UJ7 是所知唯一在火星軌道前方L4點的小行星,而目前至少有另外3顆小行星在火星軌道後方的L5附近:(5261) Eureka、 (101429) 1998 VF31、和 (311999) 2007 NS2。(121514) 1999 UJ7不僅軌道位置在其它微小的小行星的另一側,他的光譜也不一樣,更令人費解的是因為所有的火星特洛伊小行星似乎都在很穩定的軌道上。
Abstract from DBpedia / Wikipedia · CC BY-SA
via Wikidata · CC0
via Wikidata sitelinks · CC0
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).