” which is why they are called quasi-stellar objects, “quasar” for short. This specific quasar is 3C 273, identified in 1963 by the astronomer Maarten Schmidt as among the first observed quasars. 2.5 billion light-years away, Schmidt determined it could not be a star — it was too en...
the brightest of which gained proper names. Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. However, most of the stars in the Universe, including all stars outside our galaxy, the Milky Way, are invisible to the naked ...
Most black holes are probably practically invisible like this one, so finding more like this could help us get a handle on exactly how many black holes there are in our galaxy. 和这个黑洞一样,大多数的黑洞几乎都是看不见的,所以发现更多这样的黑洞可以帮助我们准确地掌握我们的星系中黑洞的数量。
Our planet sits in the solar system. Each star's system has its name after the star. IfAntares has a system, its name would be the Antares System.( )1. The sun has at leastof history.A. 4. 5 billion yearsB. 149 million yearsC. 149 billion yearsD. 4. 5 million years( )2. ...
Our results show significant differences between ... Rosenbaum,SD,Bomans,... - 《Astronomy & Astrophysics》 被引量: 25发表: 2004年 Nearest neighbour regression outperforms model-based prediction of specific star formation rate Data in astronomy is rapidly growing with upcoming surveys producing 30 ...
We study the young S-stars within a distance of 0.04 pc from the supermassive black hole in the center of our Galaxy. Given how inhospitable the region is for star formation, their presence is more puzzling the younger we estimate their ages. In this study, we analyse the result of 12 ...
Nearly everyone knows aboutSirius. It's the brightest star in our night sky and has been, at times in our history, used as a harbinger of planting by the Egyptians, and a predictor of seasonal change by other civilizations. Sirius is actually a binary star system containing Sirius A and ...
How would our galaxy merging with Andromeda impact Earth and our solar system? Not predictable for certain (because there is some tiny probability of a near collision of the sun with an M31 star) but almost certainly fairly minor because the stars are so far apart compared to their sizes ...
While there is no exact answer, it is believed that there are about 100 million black holes in our galaxy. Based on this estimate, the average distance between an arbitrary point and its nearest black hole is approximately 7 light years. However, the closest known black hole, 1A 0620-00,...
It is just one star in the universe among trillions of stars. The sun is a normal(正常的) star just like every_ 22_ star in the sky.Many of the stars in our sky have_23_, such as Antares(天蝎座 a星) and Betelgeuse(猎户座 a星). Similarly the sum also has a name.The name of...