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Why are people so dang obsessed with Mars? How viruses shape our world. The era of greyhound racing in the U. See how people have imagined life on Mars through history. Indeed, the odds against it are enormous. But the universe is a large enough place so that highly improbable coincidences can and do occur.
It's important to note, however, that even today some solar eclipses are annular because the Earth and Moon have elliptical orbits. Snapshot : ALMA spots moon-forming disk around distant exoplanet. Ask Astro : Does dark energy create the voids between galaxy clusters? Looking for galaxies in all the wrong places.
Capturing the cosmos: How to be an astrophotographer. Sky This Month : November Chiricahua Astronomy Complex: An observing mecca for amateurs. Neutron stars: A cosmic gold mine. Ask Astro : Can a black hole form without a parent star? Cosmos: Origin and Fate of the Universe. Astronomy's Moon Globe. Galaxies by David Eicher. Astronomy Puzzles. Jon Lomberg Milky Way Posters. Studying the Moon can reveal the effects of the ever changing lunar phases caused by the varying Sun-Moon-Earth angle.
From thin waning and waxing crescents to the sky-obscuring glare of a full Moon, the phases of the Moon are an integral part of our lives. The variation occurs in two ways. But it doesn't. This small variation of the moon's apparent size is easily verified with a camera. We only think the moon looks bigger on the horizon because of a psychological trick.
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