Far from the bright glare of the Moon, a much smaller companion has been quietly keeping pace with Earth, looping around the ...

China’s Shijian-21 spacecraft, a satellite with the stated purpose of cleaning up space junk, has an orbital companion, but we’re not entirely sure what it is. The Shijian-21 satellite was launched to ...

Although mass is the most important property of stars, it has proved very hard to measure for the lowest mass objects in the universe. Thanks to a powerful new camera, a very rare, low-mass companion ...

A team of scientists found a compact object 40,000 light-years from Earth that is either a very massive neutron star or an itsy-bitsy black hole, but they’re not sure which. The so-called mass gap ...

When there is a large difference in mass between two objects, such as between a star and a planet, the more massive object can exert a great deal of force on its companion. If this force is enough to ...

An international team of astronomers using the Subaru Telescope and led by a graduate student member of SOKENDAI (The Graduate University of Advanced Studies, Japan) has discovered companions circling ...

Although mass is the most important property of stars, it has proved very hard to measure for the lowest mass objects in the universe. Thanks to a powerful new camera, a very rare, low-mass companion ...

Although mass is the most important property of stars, it has proved very hard to measure for the lowest mass objects in the universe. Thanks to a powerful new camera, a very rare, low-mass companion ...