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Detected in 2017 and observable for only a few weeks, the first known interstellar object to pass through the solar system confounded astronomers, sparking speculation it could be a giant snowflake, h...
With an eye toward a possible return mission years in the future, Cornell astronomers have shown how smooth terrains – a good place to land a spacecraft and to scoop up samples – evolve on the icy wor...
Comet 67P/Churyomov-Gerasimenko – arguably the most-studied comet in history – has yielded a cosmic surprise: It emits molecular oxygen drawn from its nucleus.
How asteroid, comet strikes may have delayed evolution of atmosphere（图）
小行星 彗星撞击 大气科学 高层大气物理学
2023/6/21
Between 2.5 and 4 billion years ago, a time known as the Archean eon, Earth’s weather could often be described as cloudy with a chance of asteroid.
Back then, it was not uncommon for asteroids or com...
December 17, 2006，EAST LANSING, Mich. — After nearly 30 years of waiting, Michigan State University’s Michael Velbel finally got his opportunity to analyze some mineralogical samples that were collect...
Stardust Surprise—Comet Dust Is Mixed and Varied（图）
Stardust Comet solar system mineralogy and petrology
2006/12/15
14 December 2006,Microscopic grains collected by a U.S. probe indicate that comets are composed of a wide range of minerals of vastly different origins mixed together, according to a special section o...