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johannes kepler
Johannes Kepler used mathematics to calculate the path of the planets.
Skywatcher James Tse snapped this view of the partial solar eclipse on Nov. 25, 2011 from Christchurch, New Zealand.
Total solar eclipses are one of Nature’s grandest events. What...
Northern Hemisphere Constellations
There are 13 popular constellations in the zodiac. But these a...
Skywatcher and photographer David Paleino snapped this view of the total lunar eclipse of June 15, 2011 from Italy using a Fujifilm FinePix S2000HD camera.
Lunar eclipses occur when Earth's shadow blocks the sun. There...
In the 1500s, when virtually everyone believed Earth was the c...
The Milky Way Galaxy is organized into spiral arms of giant stars that illuminate interstellar gas and dust. The sun is in a finger called the Orion Spur.
Galaxies are composed of stars, dust, and dark matter, all hel...