Also known as the Sagittarius Star Cluster,M22is the brightest globular cluster in our sky. Its stars are 13 billion years old, almost as old as the universe itself. Here are some more fantastic globular clusters to observe through a telescope orbinoculars. Messier 3 Messier 5 Messier 10 & ...
Globular clusters do tend to be composed of old stars, but not entirely. Some of them (e.g., Omega Centauri) have a mix of stars of different ages, implying that there are episodes of star formation within the cluster over billions of years. But yes, the oldest generation of stars can...
A dense system of very old stars that has a more or less spherical structure. Globular clusters contain from ten thousand to one million stars. Compareopen cluster. The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company...
Recent studies of dSph galaxies in the Local Group and other nearby groups within 10 Mpc show that these galaxies are composed mainly of old stars, contribute the faintest end of the galaxy luminosity function, are repositories of dark matter and often contain bright globular clusters near their...
A dense spherical grouping of stars bound together by their own gravity. Globular clusters are very old and found in the halo orbiting galaxies. Our Milky Way has some 200 globulars, examples include Omega Centauri, 47 Tucanae, M4 and M13. The Andromeda Galaxy (M31) has at least 500 globul...
Globular clusters such as M2 and M3 are so old that only stars cooler, smaller and fainter than the Sun still remain on the Main Sequence. In such clusters stars which were originally like the Sun have already grown old, died, and collapsed to become white dwarfs. (S. Kafka & K. ...
Definition A globular cluster is a dense spherical collection of 105–106stars orbiting a galaxy. Their origin is poorly understood. About 160 globular clusters are known in theMilky Way, while the giant elliptical galaxy M87 may have up to 10,000. In the case of the Milky Way, they are ...
Correnti:Another reason M92 is important is that it is one of the oldest globular clusters in the Milky Way, if not the oldest one. We think M92 is between 12 and 13 billion years old. It contains some of the oldest stars that we can find, or at least that we can resolve and ch...
We propose instead that FRB 20200120E originates from a highly magnetized neutron star formed either through the accretion-induced collapse of a white dwarf, or the merger of compact stars in a binary system7. Compact binaries are efficiently formed inside globular clusters, so a model invoking...
A brief historical introduction is given. Recent advances in precision photometry of faint stars in globular clusters and in the modeling of turnoffs and synthetic horizontal branches, indicate that there is a spread in age of at least 4 Gyr among Galact