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Transcript of Astrophysics
When giant stars reach the final stages of their lives they often detonate in a giant disaster known as supernovae. Stars Stars are cosmic energy engines that produce heat, light, ultraviolet rays, x-rays, and other forms of radiation. They are composed largely of gas and plasma, a superheated state of matter composed of subatomic particles. Though the most familiar star, our own sun, stands alone, about three of every four stars exist as part of a binary system containing two mutually orbiting stars. Gravity Gravity is a force of attraction between two objects.
All objects with mass have gravity. Gravity acts like a
magnet - pulling objects together. What causes gravity
is not really known. The Earth has gravity. Gravity holds
everything close to this planet. Trees, water, animals,
buildings, and the air we breathe are all held here by
gravity. All of the planets, the stars and the moons of
the universe have gravity. Even our own bodies have
gravity. The Earth's gravity is far stronger than our own
so we don't notice the gravity our bodies possess. Q1.do our body's have gravity ?
Q2. What is the biggest star?
Q3.What is a black hole?
Q4.Who was the President when Apollo 11 happened? The Encyclopedia of Astronomy and Astrophysics explains 30 different subject areas in all their range and complexity Mission Objective
The primary objective of Apollo 11 was to complete a national goal set by President John F. Kennedy on May 25, 1961: perform a crewed lunar landing and return to Earth.