世界各地有許多創造天地的神話圍繞著銀河系發展出來。很特別的是，在希臘就有兩個相似的希臘神話故事在解釋銀河是怎麼來的。有些神話將銀河和星座結合在一起，認為成群牛隻的乳液將深藍色的天空染白了。在東亞，人們相信在天空中群星間的霧狀帶是銀色的河流，也就是所謂天河。
Intriguing reality: In the southern latitudes, the viewing conditions of your Milky Way are superior. There, the Milky Way all evening extended in winter months in the event the evenings are for a longer time and darker.
Gravity is pulling the Milky Way as well as companion closer together and The 2 are destined to collide and merge. Because the companion galaxy falls on to the Milky Way, the gravity of your Milky Way is so potent that it actually starts tearing aside the companion galaxy. The companion’s stars get pulled out into streams that may at times be so long as to wrap solely round the Milky Way. And so the companion galaxy—as we knew it—is absent. It’s not one object that we will place to, but its stars will go on to sort these streams for years. The quantity of stars you will find, the width on the streams, the paths the streams observe, as well as the properties of the stars by themselves all point out to experts how massive the companion galaxy was, when it formed, and what path it took across the Milky Way.
6 million MSun. Radio observations present that this mass is concentrated within a volume using a diameter much like that of Mercury’s orbit. The density of this subject focus exceeds that from the densest regarded star clusters by a factor of approximately 1,000,000.
The artist's notion also includes a new spiral arm, called the "Far-3 kiloparsec arm," learned by using a radio-telescope study of fuel during the Milky Way. This arm is shorter compared to the two main arms and lies alongside the bar on the galaxy.
Both gravitational microlensing and planetary transit observations reveal that there might be no less than as many planets bound to stars as you can find stars during the Milky Way,[33][163] and microlensing measurements indicate that there are a lot more rogue planets not bound to host stars than you can find stars.
If you propose to photograph the Milky Way and its Main, use equipment to visualize the galaxy’s position in the sky eventually. Our advice could be the Ephemeris app, which predicts Milky Way visibility, its Main’s specific placement, and much more.
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Astronomers notice the opposite galaxies and Examine them Using the actions on the 1 we live in. One example มาวินเบท is, after they calculated the velocities of stars and gasoline in the Milky Way, they noticed that an overall rotational movement differs from random motions. This is a attribute of the spiral galaxy.
Proof from the Milky Way consisting of numerous stars arrived in 1610 when Galileo Galilei made use of a telescope to check the Milky Way and identified that it absolutely was made up of a huge amount of faint stars. Galileo also concluded that the appearance from the Milky Way was as a consequence of refraction from the Earth's atmosphere.[eighty][eighty one][seventy three] In a treatise in 1755, Immanuel Kant, drawing on earlier perform by Thomas Wright,[eighty two] speculated (correctly) that the Milky Way may be a rotating entire body of a tremendous amount of stars, held alongside one another by gravitational forces akin into the Photo voltaic Process but on much bigger scales.
When this galaxy was to start with identified, it had been considered to be a nebula. It is not; it is a galaxy. It is really also referred to as Messier a hundred and one, mainly because it was the 101st Messier object to get cataloged.
A simulation posted in 2011 instructed the Milky Way might have obtained its spiral arm composition due to repeated collisions with the Sagittarius Dwarf Elliptical Galaxy.[226]
By the end of the visibility time in October the Galactic Middle is visible during the night. It rises previously Every night time, until eventually it disappears from the sunlight.
The movement sample matched what experts had Formerly witnessed in computer simulations of galactic collisions. These stars also differed in colour and brightness, which proposed they arrived from another galaxy.