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Gas giants orbiting our sun show a clear pattern; the more massive the planet, the lower the percentage of “heavy” elements (anything other than hydrogen and helium) in the planet’s atmosphere. But ou...
Astronomers see carbon dioxide on planet outside solar system for first time（图）
詹姆斯韦伯 太空望远镜 系外行星 大气
2022/8/25
Scientists using NASA’s James Webb Space Telescope have captured definitive evidence of carbon dioxide in the atmosphere of a planet beyond our solar system.
When it comes to directly imaging Earth-like exoplanets orbiting faraway stars, seeing isn’t always believing.
A newly discovered Jupiter-like world is so hot that it’s stretching the definition of the word “planet.”With a day-side temperature of 4,600 Kelvin (more than 7,800 degrees Fahrenheit), planet KELT-9...
Astronomers discover dark past of planet-eating ‘Death Star’
Astronomers dark past planet-eating Death Star
2016/12/15
An international team of scientists, including researchers from the University of Chicago, has made the rare discovery of a planetary system with a host star similar to Earth’s sun. Especially intrigu...
Rings around young star suggest planet formation in progress
Rings around young star planet formati progress
2016/12/12
Rice University astronomers and their colleagues have for the first time mapped gases in three dark rings around a distant star. The rings mark spaces where planets are thought to have formed from dus...
In contradiction to the long-standing idea that larger planets take longer to form, U.S. astronomers today announced the discovery of a giant planet in close orbit around a star so young that it still...
Planetesimals to protoplanets–II. Effect of debris on terrestrial planet formation
methods N-body simulations–methods numerical–Solar system formation–planetary systems formation
2015/12/25
In this paper, we extend our numerical method for simulating terrestrial planet formation to include dynamical friction from the unresolved debris component. In the previous work, we implemented a rub...
PLANETESIMALS IN THE PRESENCE OF GIANT PLANET MIGRATION
Accretion accretion disks methods:n-body simulations planetary systems planets and satellites general
2015/12/25
We present N-body simulations illustrating how giant planet migration can significantly affect the conditions for the formation of interior terrestrial planets. A giant planet migrating through aswarm...
PLANETESIMALS TO PROTOPLANETS. I. EFFECT OF FRAGMENTATION ON TERRESTRIAL PLANET FORMATION
n-body simulations planetary systems solar system
2015/12/25
We present results from a dozen direct N-body simulations of terrestrial planet formation with various initial conditions. In order to increase the realism of our simulations and investigate theeffect...
‘Upside-down planet’ reveals new method for studying binary star systems
Upside-down planet reveals new method studying binary star systems
2014/4/21
What looked at first like a sort of upside-down planet has instead revealed a new method for studying binary star systems, discovered by a University of Washington student astronomer.
Orbital physics is child's play with super planet crash
Orbital physics is child's play with super planet crash
2014/4/7
Super Planet Crash is a pretty simple game: players build their own planetary system, putting planets into orbit around a star and racking up points until they add a planet that destabilizes the whole...
Sundman Stability of Natural Planet Satellites
Hill stability Sundman stability planet satellites
2012/2/16
The stability of the motion of the planet satellites is considered in the model of the general three-body problem (Sun-planet-satellite). "Sundman surfaces" are constructed, by means of which the conc...
The 55 Cancri System: Fundamental Stellar Parameters, Habitable Zone Planet, and Super-Earth Diameter
Cancri System: Fundamental Stellar Parameters Super-Earth Diameter
2011/7/11
The bright star 55 Cancri is known to host five planets, including a transiting super-Earth. We use the CHARA Array to directly determine the following of 55 Cnc's stellar astrophysical parameters: $R...
Newly Discovered Planet May Be First Truly Habitable Exoplanet（图）
Planet First Truly Habitable Exoplanet the University of California
2010/9/29
A team of planet hunters led by astronomers at the University of California, Santa Cruz (UC Santa Cruz), and the Carnegie Institution of Washington, and supported by the National Science Foundation (N...