This article reports on an infrared survey of the Milky Way galaxy that found that 20 to 60 percent of Sun-like stars have disks of material that could form into rocky, Earth-like planets. The U.S. ...
Earth-forming stars are common in the Milky Way 来自 EBSCO 喜欢 0 阅读量: 2 作者: M Mcchain 摘要: This article reports on an infrared survey of the Milky Way galaxy that found that 20 to 60 percent of Sun-like stars have disks of material that could form into rocky, Earth-like...
Life has had plenty of opportunities to spread throughout theMilky Way galaxyover the eons, a recent study suggests — and our own Earth may be one of the key dispersal points. The sun's random motion through space has brought it close to many other stars over the past 4.6 billion years...
2Ⅲ.语法填空It is common these1(day)to hear about thediscovery of new planets orbiting(沿轨道运行) some distantstars. But so far all of those planets have been in our galaxy(星系),2 is known as the Milky Way.Now, astrophysicists from the University of Oklahomahave reported, for3first ...
Female student: What about stars? Do they ever collide? Professor: Actually, almost never. Stars are very small compared to the size of a galaxy, and they are pretty far apart from each other.Small stars, well, that term is relative, isn’t it? It’s hard to imagine the massive dista...
Next, the researchers calculated heat produced by something else: tidal force, which is energy generated from the gravitational tugging when one object orbits another. Planets in stretched out, or elliptical, orbits shift the distance between themselves and their stars as they circle them. This lead...
The issue is global but particularly common in North America,where 80% of people can-not see the Milky Way galaxy(银河系).This huge group of billions of stars should look like a wide strip of light in the dark night sky.However,only very remote places,such as the S...
According to the new study, the hydrogen might have been slow-cooked off the planet by radiation from the host stars. With less hydrogen around, the carbon would pair up with oxygen to make carbon monoxide. In fact, Spitzer found evidence for a predominance of carbon monoxide in the atmosphe...
Today, scientists are realizing this notion is outdated, Lujendra Ojha, an astrophysicist at Rutgers University, told Mashable. He and a team of researchers used computer modeling to look at planets found around red dwarf stars,the most ubiquitousin the Milky Way. They concluded that even on ...
BOSTON — Rocky planets like Earth could be found around most sun-like stars in our galaxy, new research suggests, further raising hopes that scientists will someday find ET or at least primitive life beyond our solar system. The finding is based on an analysis of dust around 309 stars ...