Copyright:
Robert Gendler
原文:
What is the nearest major galaxy to our own Milky Way Galaxy? Andromeda. In fact, our Galaxy is thought to look much like Andromeda. Together these two galaxies dominate the Local Group of galaxies. The diffuse light from Andromeda is caused by the hundreds of billions of stars that compose it. The several distinct stars that surround Andromeda’s image are actually stars in our Galaxy that are well in front of the background object. Andromeda is frequently referred to as M31 since it is the 31st object on Messier’s list of diffuse sky objects. M31 is so distant it takes about two million years for light to reach us from there. Although visible without aid, the above image of M31 is a digital mosaic of 20 frames taken with a small telescope. Much about M31 remains unknown, including exactly how long it will before it collides with our home galaxy. Explore your Universe: Random APOD Generator
中文翻譯:
最近距離我們的銀河系——銀河系的主要星系是仙女座銀河（Andromeda Galaxy）。事實上，我們的銀河系被認為與仙女座銀河相似。這兩個銀河系共同主宰著本地群星系（Local Group）。仙女座的擴散光是由數千億顆星星組成的。環繞仙女座影像的幾顆獨特星星其實是我們銀河系中位於背景物體前面的星星。仙女座經常被稱為M31，因為它是梅西耶（Messier）清單中的第31個擴散天體。M31距離我們的光需要大約兩百萬年才能抵達。雖然在沒有輔助設備下就能看見，但以上的M31圖像是用小型望遠鏡拍攝的20幀數位馬賽克。對於M31，我們仍有很多未知的事物，包括它與我們的家園銀河系碰撞的確切時間。
#仙女座 #銀河系 #M31 #天文學 #宇宙探索 #LocalGroup #星系 #星空 #科學知識 #探索宇宙
來源:NASA每日圖片
