The Local Group - Imagine the Universe!
2018年9月6日 · This site is intended for students age 14 and up, and for anyone interested in learning about our universe.
Local Group - Wikipedia
The Local Group is the galaxy group that includes the Milky Way, where Earth is located. It has a total diameter of roughly 3 megaparsecs (10 million light-years; 9×10 kilometres), and a total mass of the order of 2×10 solar masses (4×10 kg). It consists of two collections of galaxies in a "dumbbell" shape; the Milky Way and its satellites form one lobe, and the Andromeda Galaxy and its satellites constit…
Wikipedia · CC-BY-SA 许可下的文字- All stable elements of periodic table are found in CRs and abundances are very similar to solar system one. Taking Silicon abundance as reference (by definition its abundance is assumed equal for both - it is easy to measure) the relative abundances of the elements in the solar system and in galactic CRs are compared: Less H and He in CRs than in s...
Cosmic-ray spectrum in the local Galaxy | Astronomy
Identical slopes of the local and average Galactic cosmic ray spectra naturally occur in a steady-state regime in which cosmic rays are continuously injected with a nearly constant rate across …
Local Group Structure: Dynamics & Galaxies | Vaia
2024年9月5日 · The local group structure, consisting of the Milky Way, Andromeda, and other galaxies, influences cosmic distance measurements through gravitational interactions that can …
The Local Group is a small cluster of galaxies of which 35 members are currently known, including the Milky Way. It is believed that at least half of all galaxies in the Universe belong to …
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The Local Group as a Time Machine - Harvard University
2015年9月18日 · Scientists have extrapolated the character of the current galaxies in the Local Group back to the cosmic Epoch of Re-ionization, and find that even modest galaxies today …
What is the Local Group? - Universe Today
2009年5月4日 · The Local Group is just one collection of galaxies in the even bigger Virgo Supercluster. The largest, most massive galaxies in the Local Group are the Milky Way, Andromeda and the...
The Local Group as a Time Machine: Studying the High …
2015年9月18日 · Scientists from the Harvard-Smithsonian Center for Astrophysics have extrapolated the character of the current galaxies in the Local Group back to the cosmic Epoch of Re-ionization, revealing that even modest …
The Local Group: the ultimate deep field - ADS - NASA/ADS
The Local Group's stellar fossil record traces the cosmic evolution of galaxies with 10 3 ≲ M ⋆ (z = 0)/M ⊙ ≲ 10 9 (reaching M 1500 > -9 at z ∼ 7) over a region that is comparable to or larger …