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The Atmospheres of Water Worlds

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There are currently about fifty known exoplanets with diameters that range from Mars-sized to several times the Earth's and that also reside within their stars' habitable zone – the orbit...

The Remarkable Jet of the Quasar 4C+19.44

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Quasars are galaxies with massive black holes at their cores. So much energy is being radiated from near the nucleus of a quasar that it is much brighter than the rest of the entire gala...

A Young Protostellar Dust Disk

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Stars form as gravity contracts the gas and dust in an interstellar cloud until cores develop that become dense enough to coalesce into stars. The simple-sounding process is made much mo...

New Insights on Dark Energy

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The universe is not only expanding - it is accelerating outward, driven by what is commonly referred to as "dark energy." The term is a poetic analogy to label for dark matter, the myste...

The Nature of Galaxy Cluster Mini-Halos

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A mini-halo is a faint, diffuse region of radio emission that surrounds a cluster of galaxies. So far about thirty of these cluster mini-halos have been detected via their X-ray and radio...

Fast Radio Bursts May Be Firing Off Every Second

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Cambridge, MA - When fast radio bursts, or FRBs, were first detected in 2001, astronomers had never seen anything like them before. Since then, astronomers have found a couple of dozen...

The Stratosphere of a Hot Exoplanet

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The stratosphere of a planetary atmosphere is the layer in which the temperatures rise with altitude, in contrast to the tropospheric layer (near the ground) in which the temperature fall...
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