搜索结果: 1-15 共查到“天文学 planet”相关记录80条 . 查询时间(0.097 秒)
As a star runs out of fuel, it will billow out to a million times its original size, engulfing any matter — and planets — in its wake. Scientists have observed hints of stars just before, and shortly ...
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
2023/6/25
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.
Solving solar puzzle could help save Earth from planet-wide blackouts
space weather prediction convection sunspots
2021/8/6
Understanding the Sun's magnetic dynamo could help predict solar weather, such as potentially dangerous geothermal storms, solar flares and sunspots. Mathematicians have proposed a new model of the Su...
Earth's mantle, not its core, may have generated planet's early magnetic field（图）
Earth's mantle generated planet early magnetic field
2020/3/13
New research lends credence to an unorthodox retelling of the story of early Earth that was first proposed by a geophysicist at the Scripps Institution of Oceanography in La Jolla, Californi...
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
2016/12/27
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
2016/12/27
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...
If you thought Luke Skywalker's home planet, Tatooine, was a strange world with its two suns in the sky, imagine this: a planet where you'd either experience constant daylight or enjoy triple sunrises...
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...
Planet Formation in Earth-like Orbit around a Young Star
Planet Formation Earth Young Star
2016/4/13
The disks of dust and gas that surround young stars are the formation sites of planets. New images from the Atacama Large Millimeter/submillimeter Array (ALMA) reveal never-before-seen detai...
NASA selects Penn State to lead next-generation planet finder
NASA Penn State lead next-generation planet finder
2016/4/13
A Penn State-led research group has been selected by NASA's Astrophysics Division to build a $10-million, cutting-edge instrument to detect planets orbiting stars outside our solar system. The team, l...
New images of a young star made with the Karl G. Jansky Very Large Array (VLA) reveal what scientists think may be the very earliest stages in the formation of planets. The scientists used the VLA to ...
ALMA reveals planet-forming potential of protoplanetary disk
ALMA planet-forming potential protoplanetary disk
2016/2/23
Astronomers struggle to understand how planets form in binary star systems. Early models suggested that the gravitational tug-of-war between two stellar bodies would send young planets into eccentric ...