“Unfortunately we can’t get a complete picture of the Milky Way from outside, so we have had to resort to other methods,” said Newman. “Not only are we looking at Milky Way from the inside, but it’s even worse than that — our view is blocked by dust, both in clouds and di...
We review the impact of multiple populations on different regions of the colour-magnitude diagram and underline the constraints related to the observed abundances of lithium, to the cluster dynamics, and to the frequency of binaries in stars of different chemical composition. We then re-consider ...
What globular cluster is closest to Earth? Messier 4, or M4, is the closest known globular cluster to Earth. The cluster sits just 5,500 light-years from Earth. Omega Centauri Omega Centauri is one of the largest globular clusters in the Milky Way. Astronomers think it contains roughly ...
VizieR Online Data Catalog: What is the Milky Way outer halo made of? (Battaglia+, 2017) G Battaglia,P North,P Jablonka,... 被引量: 0发表: 2017年 A Machine Learning Approach for Dynamical Mass Measurements of Galaxy Clusters We present a modern machine learning approach for cluster ...
The most famous open cluster is the Pleiades, also known as M45 or the Seven Sisters. That last moniker, however, is something of a misdirection; the cluster has more than 1,000 stars, according to NASA, though only a handful of its brightest are visible to the naked eye. Other well-...
How would we ever have proven the existence of a black hole, in that case? According to NASA, this image from the Hubble Space Telescope indicates that a huge ring of dark matter probably surrounds the center of the galaxy cluster CL0024+17. Credit: NASA, ESA, M. J. Jee and H. ...
Age of the Milky Way There are various methods that we use to estimate the age of our Galaxy. Scientists have used star dating methods to date old stars and found some as old as 12.6 billion years (those in the globular cluster M4). This sets a lower bound for the age. ...
But it is, nevertheless... RD Northey,AW Skemption - 《Geotechnique》 被引量: 346发表: 1952年 A statistical investigation into the shape of the globular cluster luminosity distribution Recent observations of the globular clusters in the Milky Way and M31 confirm that their luminosities follow a...
Home to thousands of galaxies the Virgo Cluster is the nearest massive cluster of galaxies to the Local Group, where theMilky Wayresides. The extreme size and proximity make the cluster easy to study, but it also has other features that make it ripe for observation. “The Virgo Cluster is ...
Helix Nebula (one of the closest to the Earth of all the bright planetary nebulae) - 3 LightyearsOrion Nebula (brightest nebulae, and is visible to the naked eye in the night sky) - 24 light yearsOmega Centauri (largest globular cluster in the Milky Way) - 150 light yearsSmall ...