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Examples
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Click here to see an animation showing a simulation of the hot atmosphere of the 5.3 Earth-mass planet 61 Vir b as it circles around its star in a 4.2 day orbit.
First Super-Earths Discovered Around Sun-like Stars | Universe Today 2009
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An Earth-mass planet in the GJ 581 planetary system
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The journal Nature quoted astronomer Greg Laughlin from the University of California at Santa Cruz, saying that the delay for Kepler makes it "more likely that the first Earth-mass planet is going to go to the radial-velocity observers".
No Earth-Sized Planet Hunting for Kepler Until 2011 | Universe Today 2009
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Due to improvements in equipment and observing techniques, these ground-based methods are now capable of finding Earth-mass objects around nearby stars, according to team member Gregory Laughlin, professor of astronomy and astrophysics at UCSC.
First Super-Earths Discovered Around Sun-like Stars | Universe Today 2009
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An Earth-mass planet in the GJ 581 planetary system
NASA Watch: Space & Planetary Science: October 2009 Archives 2009
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Here we report supercomputer simulations of the concordance cosmological model, which assumes neutralino dark matter (at present the preferred candidate), and find that the first objects to form are numerous Earth-mass dark-matter haloes about as large as the Solar System.
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Title: Earth-mass dark-matter haloes as the first structures in the early Universe
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But the smallest Blieder apparatus has an Earth-mass of more than three hundred tons.
Science Fiction Hall of Fame Various, 1973
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The goal is to directly image an extrasolar Earth-mass and demonstrate (via spectroscopy) that it has biosignatures.
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But on the other side is an Earth-mass black hole.
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