And the powerful gravity of such a large planet holds onto its massive atmosphere even when it's so close to that sun.So we find this one gas giant planet orbiting very close to its sun.And then it turns out that 51 Pegacy B is not at all unique.That is just the first of a numb...
For now, the focus is on locating planets within a host star's so called "habitable zone", a zone that's a certain distance from its star ,because only planets within this zone could conceivably support carbon-based life. So, what would such a planet need?
However, astronomers assume that a third planet may be lurking between two ones in the zone of life. 4. Van Maanen Star Van Maanen Star is the closest stand-alone white dwarf to us: it is 14 light-years away from the Sun. They have just received a signal from Earth that Barack Obama...
which is hotter than the surface of the sun. Consequently, the gas giant displays a larger temperature gradient from surface to core than any other planet. By comparison, the surface-to-core gradient on Earth is approximately 5,000 degrees Celsius (9,000 degrees Fahrenheit). Mercury has ...
Our solar system is located in the Orion arm of the Milky Way galaxy. It has eight planets, each of which orbit the sun at the center of the solar system. Pluto was once thought of as the ninth planet. However, discoveries lead to a change in the definit
The difference between an asteroid, a planet and a moon is that Asteroids do not have enough mass to be spherical. Ceres is an asteroid within the belt commonly called a Dwarf Planet. A planet obeys the above rules that define what a planet is by IAU standards. A moon orbits a ...
Neptune is the furthest planet from the Sun in our solar system. It takes Neptune 16 hours to make one revolution, so its day is 16 hours long, although it takes Neptune 165 Earth years to make one orbit around the Sun. Neptune is classified as an ice giant. This is a planet where ...
So many strange worlds, with no sign of life. Not one other planet similar to our own.有那么多奇怪的世界，却没有生命的迹象。没有任何一个星球与我们的地球相似。So could it be that Earth really is unique? All living things on Earth are made of the same building blocks, long carbon-based...
Keep an eye out for Earthshine on the moon. Sometimes called the Ashen Glow or the Old Moon in the New Moon's Arms, the phenomenon is visible within a day or two of new moon, when sunlight reflected off Earth and back toward the moon slightly brightens the unlit portion of the moon'...
Rocky Planet (Mercury, Venus, Earth, Mars) Gas Giant (Jupiter, Saturn, Uranus, Neptune) The discovery of the kuiper belt object Eris had prompted the discussion. Eris was believed to be bigger than Pluto which at that time was the ninth planet in the Solar System. A number of requirement...