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1. AstrOlympics
The AstrOlympics project compares feats from the amazing athletes in the Olympics with the awesome spectacles of the cosmos.
Spanish and Portuguese translations are also available. (Illustration: NASA/CXC/K.Divona)
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2. AstrOlympics: DISTANCE
DEFINITION: how far away an object is or the amount of ground an object has covered in its motion.
Spanish and Portuguese translations are also available. (Illustration: NASA/CXC/K.Divona)
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3. AstrOlympics: MASS
DEFINITION: how much matter an object contains. Alternative definition: how many atoms are in an object.
Spanish and Portuguese translations are also available. (Illustration: NASA/CXC/K.Divona)
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4. AstrOlympics: PRESSURE
DEFINITION: force over a particular area.
Spanish and Portuguese translations are also available. (Illustration: NASA/CXC/K.Divona)
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5. AstrOlympics: ROTATION
DEFINITION: when an object turns around a central axis. Rotational speed is defined as the number of turns around an axis over a given time.
Spanish and Portuguese translations are also available. (Illustration: NASA/CXC/K.Divona)
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6. AstrOlympics: SPEED
DEFINITION: distance traveled over a certain period of time.
Spanish and Portuguese translations are also available. (Illustration: NASA/CXC/K.Divona)
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7. AstrOlympics: TIME
DEFINITION: the accurate measurement of repeating patterns.
Spanish and Portuguese translations are also available. (Illustration: NASA/CXC/K.Divona)
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8. Blasts from the Past: Historic Supernovas
Every 50 years or so, a star in our Galaxy blows itself apart in a supernova explosion, one of the most violent events in the universe. The force of these explosions produces spectacular light shows. Explosions in past millennia have been bright enough to catch the attention of early astronomers hundreds of years before the telescope had been invented. (Illustration: NASA/CXC/M.Weiss)

9. AstrOlympics: Paralympics: ACCELERATION
DEFINITION: the change of velocity of an object over time. (Illustration: NASA/CXC/K.Divona)
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10. AstrOlympics: Paralympics: DENSITY
DEFINITION: how much mass is in a certain volume. (Illustration: NASA/CXC/K.Divona)
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11. Chandra's Sweet 16
In 2015, NASA's Chandra X-ray Observatory celebrated its own "sweet 16." July 23rd marked Chandra's birthday, as it was launched aboard the Space Shuttle Columbia and then deployed into space on this day sixteen years ago. In August 2015, Chandra passed the 16th anniversary of another milestone in the mission—the release of the "First Light" images from the telescope (Illustration: NASA/CXC/M.Weiss)

12. 15 Years: Revolutionary X-ray View
In fifteen years of operation, NASA's Chandra X-ray Observatory has given us a revolutionary X-ray view of the Universe that is largely hidden from optical telescopes, and enabled breakthroughs in understanding. (Illustration: NASA/CXC/M.Weiss)

13. 15 Years: The Big & Beautiful Universe
The Chandra spacecraft has reached its 15th year of operation. Because of its high orbit and the continued success of its components, it is expected to keep operating for many more years. (Illustration: NASA/CXC/M.Weiss)

14. 15 Years Of Chandra
The Chandra spacecraft has reached its 15th year of operation. Because of its high orbit and the continued success of its components, it is expected to keep operating for many more years. (Illustration: NASA/CXC/M.Weiss)

15. The Flow of Electric Charge
Violent electric discharges are responsible for some of the most spectacular displays of sudden energy release. (Illustration: NASA/CXC/M.Weiss)

16. Wind
A wind can occur wherever a difference in pressure between two locations is not balanced by some other force such as gravity. (Illustration: NASA/CXC/M.Weiss)

17. Light in the Universe
Light is energy that can take on many forms. Radio waves, microwaves, infrared, visible, ultraviolet, X-ray and gamma radiation are all different forms of light. (Illustration: NASA/CXC/M.Weiss)

18. Atoms: Building Blocks of Matter
Atoms are constantly in motion moving around at speeds that are thousands of miles per hour at room temperatures and millions of miles per hour behind a supernova shockwave. (Illustration: NASA/CXC/M.Weiss)

19. How to Color the Universe
By making images from their data, coloring them thoughtfully, and combining them carefully, we get a more complete picture of our Universe. (Illustration: NASA/CXC/M.Weiss)

20. Solar System
The Sun’s hot outer atmosphere produces X-rays, but because it is so close, it is too bright for Chandra’s sensitive eyes. (Illustration: NASA/CXC/M.Weiss)

21. Neutron Stars
Despite the fact a neutron star is only about 13 miles (20km) in diameter it is about 1.5 times more massive than the sun. (Illustration: NASA/CXC/M.Weiss)

22. Dark Energy & Dark Matter
The two largest pieces of the Universe that we know the least about, yet nothing less than the ultimate fate of the Universe will be determined by them. (Illustration: NASA/CXC/M.Weiss)
The Universe in a Jelly Bean Jar

23. Stellar Evolution
The rate of evolution and the ultimate fate of a star depends on its mass. (Illustration: NASA/CXC/M.Weiss)

24. The Milky Way
The Milky Way is not an island universe,but a member of a small cluster of galaxies called the Local Group. (Illustration: NASA/CXC/M.Weiss)

25. Black Holes
A black hole is an object containing so much mass concentrated in a relatively small space that light can not escape.(Illustration: NASA/CXC/M.Weiss)