A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other. Binary stars in the night sky that are seen as a single object to the naked eye are often resolved as separate stars using a telescope, in which case they are called visual binaries. Many visual binaries have long ...

Star clusters are large groups of stars held together by self-gravitation. Two main types of star clusters can be distinguished. Globular clusters are tight groups of ten thousand to millions of old stars which are gravitationally bound.

2023年11月22日 · A binary star is a system of two gravitationally bound stars that orbit a common center of mass called a barycenter. Stars in a binary system do not necessarily have the same mass, size...

2024年10月22日 · Binary Stars The variety seen in double-star systems is nearly as rich as the galaxy’s stellar population as a whole. These pairs can differ significantly in mass, with, say, a mid-sized yellow star like our Sun locked in an orbital embrace with a …

2024年12月17日 · Scientists have uncovered the existence of a binary star system close to the black hole near the center of the Milky Way galaxy, confirming a hypothesis made by happenstance nearly a century ago, according to a paper published in …

X-ray observations of clusters have revealed many of these binary systems, which include low-radiation quiescent low-mass X-ray binaries (qLMXBs), which are ordinary stars paired with neutron stars that pull matter from their companions into a hot accretion disk.

Binary star systems are pairs of stars that orbit around a common center. They are held together by their gravitational pull. These systems are like a cosmic dance, with two stars moving together in space.

2024年12月19日 · Binary star, pair of stars in orbit around their common center of gravity. A high proportion, perhaps one-half, of all stars in the Milky Way Galaxy are binaries or members of more complex multiple systems. Some binaries form a class of variable stars, the eclipsing variables.

2022年6月12日 · The aim of this study is to search for close binary gravitationally bound pairs of open star clusters (CBOCs). We divided the observed pairs of clusters into visual binaries (VBOCs) and close pairs of CBOCs. Close pairs are physically bound clusters; the distances between them do not exceed 7 pc.

2008年4月4日 · Binary stars, when they are widely separated, are described as the action of Newtonian gravity on two point-masses. Each star moves in an elliptical orbit, and the motion of one star relative to the other also traces an ellipse.