Join in expert discussion on the topics of Astronomy and astrophysics. This may include discussion on celestial objects, space, and the physical universe as a whole. Mainstream science only.
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Confusion over gravity and tides
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Planetary Alignment: Will It Affect Us?
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Stars in the Western sky in early evening
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How Can You Identify Meteorites?
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A star for every grain of sand.
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Can a Lost Space Toolbag be Filmed from Earth?
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Can Humans Survive in a Spacecraft to the Moon?
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What Is the Composition of Black Holes?
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Find Longitude of Sun - Learn How Now
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Spider free mount for secondary mirror
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Hurricane size whirlpool on the Sun
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Why Do We See the Same Stars All Year?
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Prove that the earth goes around the sun
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Are G-forces smaller when traveling in space?
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Why Do Stars Appear to Move Away From Us?
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Why the earth is rotating along its axis?
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Help Calculating Parallax Error - Physics Forums
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What is the cause of the rotation of the planets
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Black Holes & Wormholes - What Happens?
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Tides are influenced by the moon
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Best Telescope: Refractor vs Reflector
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What Would Happen if the Sun Was Blue?
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What Determines Earth's Yearly Cycle?
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Should we Makemake anything about the name?
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Energy carried by the bulk motion of matter
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The Mysteries of the Universe: A Parent's Guide
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Pluto belongs to a new category : plutoids
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Could ever Pluto slam into Neptune?
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Why do we experience seasons on Earth?
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Sun's Mass Loss: How Much Is Lost Annually?
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Radio waves are electromagnetic.Right?
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How do we know the Sun orbits the Galaxy?
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Are Our Atoms Stardust or Nuclear Waste?
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Is There Really No Gravity in Space?
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Could light be a media for transport?
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What is the speed of the moon's motion?
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Magnetism of Planets: Do Other Have It?
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Why Are All Planets in the Same Plane?
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Is the earth the centre of the solar system?
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The Earth and its orbit around the sun
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Moon without Earth: What if Earth Disappears?
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Demonstrating Moon's Lack of Internal Rotation
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Finding a Local Star Like Ours: 10-50 LY Radius
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Why do we see the near side of the moon only?
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Newbie question on atsrophotography
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A Beginner's Guide to Learning About Black Holes
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Gravity Anomaly: What Could Be Causing It?
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Stars twinkle, but planets don't?
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What causes gravity? Is it mass or weight?
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Research Help: Get Info on 9 Planets
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