The largest known star 孙西西 国际教育 来自专栏 · 小米说天文 Is Earth big? I believe many people think it is big. Earth's diameter is 12,756 kilometers. But in the universe,It's small,very small. Many stars are bigger than the Earth. Like our sun,its diameter is 140,0000 kilo...
As mentioned earlier, objects whose mass is greater than the Chandrasekhar mass cannot exist as white dwarfs and must collapse. If their mass is not too great, their collapse will be halted by the neutron degeneracy pressure, and they will become neutron stars. The existence of neutron stars ...
When astronomers look at thelargest stars(by volume) in the universe, they see a great many red supergiants. However, these behemoths are not necessarily—and almost never are—thelargest stars by mass. It turns out they're a late stage of a star's existence and they don't always fade...
is currently among the largest known planets in terms of width. Yet the exoplanet, which is 1,200 light-years from Earth, has a very low density, so it has only about a third of the mass of Jupiter, Ulmer-Moll said.
discovered what may be the largest black hole known to date.The black hole has a mass (量) of about 30 billion suns and sits at the center of a galaxy(星系), which is hundreds of millions of light-years from the Earth.Black holes are one of the most powerful forces in the universe...
Jupiter was not a star but a planet was very important.Before this time, people believed the Earth to be the centre of the universe.They thought that the sun, stars, and other planets all revolved around the Earth.However, Galileo proved that the sun was at the centre of the universe!
exoplanets being discovered around other stars, more than 5000 at the last count, we do see evidence for larger planets, some of which are "puffed up" because they're really close to their parent stars and getting a lot of energy from them to heat their atmospheres to thousands of degrees...
It is one of the most recognizable constellations in the sky, with its seven most luminous stars forming an asterism known as the Big Dipper, although the constellation itself actually contains around 209 stars, the brightest of which is Alioth, a blue-white subdwarf of magnitude +1.76 ...
“Redshift surveys provide key information about how much matter there is in the universe and how it clusters,” he says. “We can now measure so many galaxies so precisely that they also give us a handle on dark energy and neutrinos. Today we celebrate the start of the DESI survey and...
They thought that the sun, stars, and other planets all revolved around the Earth. However, Galileo proved that the sun was at the centre of the universe! (A) Jupiter is farther out in the solar system than Earth, so it takes longer to revolve around the sun. (B) However, a day ...