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Astronomy Facts

White Dwarfs

White dwarfs are among the dimmest stars in the universe. Even so, they have commanded the attention of astronomers ever since the first white dwarf was observed by optical telescopes in the middle of ... Continue reading

The artist's illustration depicts a classical nova binary system just before an explosion on the surface of the white dwarf. Classical novas occur in a system where a white dwarf closely orbits a normal, companion star.

Big Fish

The phrase 'big fish eat little fish' may hold true when it comes to planets and stars. Perhaps as many as 100 million of the sun-like stars in our galaxy harbor close-orbiting gas giant planets like ... Continue reading

Hubble Space Telescope in orbit as seen from the Space Shuttle.

Does The Sun Go A Bit Wobbly?

Our Sun may seem an enduring, unwavering beacon in the sky, but in truth it has a 'heartbeat' of sorts--a pulsation between dimmer and brighter phases so slow that it only 'beats' 9 times each ... Continue reading

Two Face? Absolutely!

During the Viking missions to Mars in the mid 1970s, the planet was imaged from orbit by the Viking 1 and 2 Orbiters. These spacecraft returned images of regions of the planet that, while similar to ... Continue reading

On the first day of the Mapping Phase of the Mars Global Surveyor mission, MOC was greeted with this view of 'Happy Face Crater' smiling back at the camera from its location on the east side of Argyre Planitia. This crater is officially known as Galle Crater, and it is about 215 kilometers (134 miles) across.

More Astronomy Facts

Comets and Asteroids:

  1. Catch A Shooting Star
  2. Large Asteroid Zooms Safely Past Earth
  3. Look, Up in the Sky. It's A Bird. No It's A Meteorite!
  4. NASA Spacecraft Reveals Surprising Anatomy Of A Comet
  5. Stars With Long Hair
  6. The Minor Planets
  7. Uncharted Meteors
  8. X-ray Emissions From Comets

Cosmology:

  1. A Map of the Sky
  2. Binary and Multiple Star Systems
  3. Dark Energy Changes the Universe
  4. Dark Matter Mystery
  5. From Here To There
  6. Hats Off to the Sombrero
  7. Introduction to Constellations
  8. Introduction to Constellations
  9. Live Fast, Blow Hard, and Die Young
  10. Near-Earth Supernovas
  11. Neutron Stars
  12. Reading The Colors of the Spectrum
  13. The Big Bang Model
  14. The Chandra Mission
  15. The First Starlight
  16. The Oldest Light in the Universe
  17. The Wilkinson Microwave Anisotropy Probe (WMAP)
  18. What is Dark Energy?
  19. What Powered the Big Bang?

Deep Space:

  1. A Ring Around a Dying Star
  2. Ancient Planet
  3. Ancient Planet in a Globular Cluster Core
  4. Astronomers Glimpse Feeding Of A Galactic Dragon
  5. Black Hole Sound Waves
  6. Cosmos Provides Astronomers with Planet-Hunting Tool
  7. Crab Nebula
  8. Galaxy Cluster RDCS 1252.9-2927
  9. Groups & Clusters of Galaxies
  10. Hubble & Keck Teams Find Farthest Known Galaxy in Universe
  11. It's a Supernova
  12. Light Fantastic
  13. Magnitude of an Astronomical Object
  14. N81
  15. New Evidence Points to a Gamma-Ray Burst... In Our Own Backyard
  16. Nursery of Giants Captured in New Spitzer Image
  17. Powerful Quasars
  18. Starburst, No, Not The Candy
  19. The Antennae
  20. White Dwarfs

Exploration:

  1. Astronaut Photography
  2. Backyard Telescopes for New Planets. Is it Possible?
  3. Exercising In Space
  4. GP-B: More Than Just a Pretty Face
  5. Laser Guide Stars
  6. Microbes In Space
  7. Mission: Gather Comet Dust; Return To Earth
  8. Mixed Up In Space
  9. Sputnik and The Dawn of the Space Age
  10. Stopping In Thin Air
  11. The Brave and Cold Ulysses
  12. The Devil's In The Details
  13. Voyager Phone Home
  14. Wernher Von Braun
  15. What Is Microgravity?
  16. X-ray Telescopes

Observations:

  1. Amazing GRACE
  2. An Old Science Experiment On The Moon
  3. How Far Are The Seven Sisters?
  4. Jumping Starlight
  5. Right Ascension & Declination
  6. Rossi X-ray Timing Explorer Solves Mystery of Pulsar 'Speed Limit'
  7. The Constellations
  8. What Is Polarimetry?

Solar:

  1. Does The Sun Go A Bit Wobbly?
  2. Is There Weather In Space?
  3. Keeping Your Balance for Good Science
  4. Solar Spitwads
  5. The Color of The Sunset
  6. The Sun’s Corona

Solar System:

  1. 318 Times as Massive as Earth
  2. A Giant X-Ray Machine
  3. A Satellite Of Our Own
  4. Big Fish
  5. Blast Wave Blows Through the Solar System
  6. Exploring The 'Red Planet'
  7. Introduction To Jupiter
  8. It's Dusty Out There
  9. It's Gonna Hit Us... Or Is It?
  10. Jupiter's Great Red Spot - A Super Storm
  11. Lunar Explorations
  12. Mercury
  13. Mount Olympus
  14. Neptune: The Basics
  15. Not Quite A Planet
  16. Pluto Is Way Out There
  17. Pluto: Beyond Neptune Or Not?
  18. Saturn: The Basics
  19. Sibling Rivalry: A Mars/Earth Comparison
  20. The Kuiper Belt
  21. The Real Lord of the Rings
  22. The Strange Spin of Uranus
  23. The Strange Spires of Callisto
  24. The Sun, The Mighty Engine Of Our Solar System
  25. Two Face? Absolutely!
  26. Venus Is Hot Stuff
  27. What Happens at the Edge of a Black Hole?
  28. Will the Sun Shine Forever?

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