And, how much range of gravity force?
2007-01-15 18:34:29 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Local Group, gravitationally bound galaxy cluster of which the Milky Way is a member. The group’s three largest galaxies—the Milky Way, the Andromeda Galaxy (Messier 31), and the Triangulum Galaxy (M33)—are all spirals. Other members include the Magellanic Clouds (satellites of the Milky Way), M32 and M110 (satellites of the Andromeda Galaxy), and a number of dwarf systems. In all, 31 galaxies are currently thought to belong to the Local Group, which spans a diameter of some 3 million light years. Galaxy clusters are believed to be part of a greater universal hierarchy of superclusters. The Local Group probably lies on the edge of a supercluster centred on the Virgo Cluster. Motion of the galaxies relative to each other is complex: satellite galaxies are gravitationally bound to their large spiral companions, while the Milky Way and Andromeda galaxies themselves are approaching each other at some 50 km per second (30 mi/sec). The Local Group as a whole, on the other hand, is moving away from the Virgo Cluster at some 1,140 km per second (700 mi/sec), while both clusters are moving towards the unseen mass known as the Great Attractor.
2007-01-15 21:30:43 · answer #1 · answered by tas 4 · 2⤊ 0⤋
Actually there are several closer than Andromeda. Check this out:
"March 28, 2005
A diffuse collection of stars southwest of the Big Dipper's bowl is a small galaxy revolving around our own, say astronomers in the United States and Europe. The new-found galaxy is roughly 330,000 light-years away — only twice as far as the Large Magellanic Cloud, the Milky Way's brightest satellite galaxy." [See source.]
Both the Cloud and the new Ursa Major spherical galaxy are satellites of our Milky Way. There is also a third satellite galaxy, an elliptical one, but I don't remember its name right off hand. Anyway, the point is that there are other galaxies embedded in our own Milky Way; so galaxies outside ours, like Andromeda's, are farther away.
2007-01-15 18:55:09 · answer #2 · answered by oldprof 7 · 2⤊ 1⤋
The Andromeda Galaxy (..M31..) is the other one. Our Milky Way and the Andromeda Galaxy are on a collision course by the way, and a recent research study indicated that the collision may have already begun since it seems some outer regions of our galaxy and M31 are already intermingled to some extent.
2007-01-15 18:40:30 · answer #3 · answered by Chug-a-Lug 7 · 3⤊ 0⤋
chocolate and caramel? jk. dude, I have not got any concept, yet those human beings seem to: "A spiral galaxy like the Milky way has 3 person-friendly factors to its seen rely: (a million) the disk (containing the spiral hands), (2) the halo, and (3) the nucleus or crucial bulge. those factors are indicated schematically interior the adjoining parent. The halo and the nucleus are additionally observed mutually because of the fact the around area of the galaxy considering that they have an approximately around distribution with admire to the middle of the galaxy. "to boot to those seen factors, the galaxy additionally includes a minimum of three different factors that are "invisible": the galactic magnetic container, charged debris trapped interior the galactic magnetic container, and a halo of "dark rely" it is of unknown composition yet that makes itself felt by using its gravitational impact on the seen rely."
2016-10-31 05:56:24 · answer #4 · answered by Anonymous · 0⤊ 0⤋