The stars in the Alpha Centauri system include a pair called “A” and “B,” which orbit (绕轨道而行) relatively close to each other. Alpha Centauri A is a near twin of our Sun in almost every way, including age. A...
detect periodic movement of a sun-like star of only 30 centimeters per second,” Toumi said. “This is the current record in precision and means that we are only a factor of three away from the ability to detect Earth-like planets orbiting such stars. Plenty of work is needed, but we ...
Alpha Centauri is a triple star system located just over four light years, or about 25 trillion miles, from Earth. While this is a large distance in terrestrial terms, it is much closer than the next nearest Sun-like stars. "Because it is relatively close, the Alpha Centauri system is se...
From α Centauri, the sun would have an apparent magnitude of 0.5, about like Betelguese or Procyon from Earth. If you want to make this calculation for any star, use the formula 4.8 + 5 * ((log10 (d/3.26))-1) where d is the distance in ly. To calculate for other stars, rep...
This map shows all the star systems that lie within 12.5 light years of our Sun. Most of the stars are red dwarfs - stars with a tenth of the Sun's mass and less than one hundredth the luminosity. Roughly eighty percent of all the stars in the universe are red dwarfs, and the near...
S. Kim, et al., “The Complete Census of 70 μm-Bright Debris Disks within “the Formation and Evolution of Planetary Systems” Spitzer Legacy Survey of Sun-Like Stars,” Astrophys. J. 677, 930–956 (2008). Article Google Scholar L. Hillenbrand, S. Strom, N. Carvet, et al., “...
As part of our systematic campaign to discover and characterize stars within 10 pc, we have found a star that ranks 20th among the Sun's nearest neighbors. This star, known as GJ 1061, has V = 13.0, K = 6.6, and lies only 3.7 pc away. GJ 1061 is a shocking reminder of how littl...
摘要: It's well known that there are structure of the distribution of the nearest light stars (Herschel(1847) and Guld(1879)). Some visual phenomena which connected with numbering by brightness give possible evidence of the existence more thin structure....
If you want to study the stars, there’s no better place to start than close to home. After all, the nearest star is just 93 million miles (150 million kilometers) away: the Sun. Its daily presence and predictable motions through the sky may make it seem like a boring, steady compani...
“A wrecking ball of dark matter 5 million times the mass of the Sun may be the best explanation for a disrupted stream of stars.” [“Dark matter may have punched a hole in the Milky Way”. Astronomy] “Dark matter itself consists of slow-moving, or “cold,” particles that come t...