The meaning of LIGHT-YEAR is a unit of length in astronomy equal to the distance that light travels in one year in a vacuum or about 5.88 trillion miles (9.46 trillion kilometers). How to use light-year in a sentence.
Milky Way The spiral galaxy home of our solar system. Its 150 billion stars extend for 500,000 light years and have existed for about 12 billion years. Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited ...
The Milky Way GalaxyNumber of stars within 50 000 light years = 200 billion About the Map This map shows the full extent of the Milky Way galaxy - a spiral galaxy of at least two hundred billion stars. Our Sun is buried deep within the Orion Arm about 26 000 light years from the ...
The sun lies roughly 27,000 light-years from the center of the galaxy, and in the galactic plane. When we look in the plane of the disk we see the combined light of its stars as the Milky Way. The diameter of the disk is c.120,000 light-years; its average thickness is 10,000 ...
Surrounding the galaxy for thousand and thousand of light years is space.At great distances,however,billions of other galaxies are scattered.These galaxies are of many shapes and sizes.The Milky Way Galaxy is shaped like a spiral(螺旋型)disk.Other galaxies have been found to be shaped like ...
of our galaxy's evolution. As our young galaxy encountered rival galaxies, it experienced a series of violent growth spurts and intense periods of cataclysmic change while battling to survive. Over billions of years, our Milky Way cannibalised neighbouring galaxies, adding countless new stars and ...
Number of stars within 500 000 light years =225 billion About the Map The Milky Way is surrounded by several dwarf galaxies, typically containing a few tens of millions of stars, which is insignificant compared with the number of stars in the Milky Way itself. This map shows the closest dwa...
62.A.细节理解题 根据第一段"The name of our galaxy (银河),the Milky Way,comes from its appearance.It's a milky white band of glowing light that spreads across the night sky."可知我们银河系的名字来源于它的外观.它是一条乳白色的发光带,遍布
One of the most distant exoplanets is 3,000 light-years (17.6 quadrillion miles) away from us in the Milky Way. If you were to travel at 60 miles an hour, you would not reach this exoplanet for 28 billion years. Our Milky Way galaxy is approximately 100,000 light-years across (~588...
—Galaxy cluster spied forming in early universe (photos, video) In 2014, the same team identified theLaniakea Supercluster, which houses the Milky Way (and around 100,000 other galaxies) but is still only 500 million light-years wide, aka half the width of Ho'oleilana. The Laniakea Supercl...