from the breakthroughs in astronomy the 20th century was that
A) there to become existence on Mars.
B) in the biggest scale, galaxies are at random distributed in space.
C) our star, the sun's rays, is outdoors from the Milky Way.
D) our universe is alone among another galaxies it's not of the cluster of galaxies.
E) our universe is just of billions within the world.
References :
Astronomy Software List - Freeware Shareware Commercial
Looking at the Stars From Angles Old and New - New York Times
Constellation - Wikipedia the free encyclopedia
Star chart encyclopedia topics | Reference.com
3 responses to what was one of the great discoveries in astronomy during the 20th century?
e
A and C i believe
E is the only accurate one.
Ignore the first answerer, they don't know what the hell they're talking about.
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