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Hot Topic Deep Space Cosmic Evolution
A Young, Hula-Hooping Star
Topic: Cosmic Evolution
Summary: Astronomers have spotted a young stellar system that 'blinks' every 93 days. The system likely consists of three developing stars. Two of the stars have a disk of material that surrounds them like a hula hoop.

Solar System's Youth Gives Clues to Planet Search
Topic: Cosmic Evolution
Summary: New theoretical models show how an outburst event in the Sun's formative years could have affected our solar system's development.

Galaxies Feast and Fast to Stay Thin
Topic: Cosmic Evolution
Summary: A new study helps explain why so few high-mass galaxies exist. Galaxies grow when they consume gas clouds and produce stars. Now scientists have revealed that star formation also jettisons gas to the outer edge of the galaxy, 'starving' it for a period of time and keeping its mass down.

ALMA Sees a Solar System's 'Snow Line,' Where Planets and Comets Form
Topic: Cosmic Evolution
Summary: For the first time, a snow line has been imaged in the dusty disc of a far-off, infant solar system.

Two Suns Better for Life
Topic: Cosmic Evolution
Summary: A new study shows that binary stars could be more hospitable to habitable planets than single-star systems.

Gold Comes From Colliding Dead Stars
Topic: Cosmic Evolution
Summary: Observations of a gamma-ray burst last month reveal that it resulted from the collision of two neutron stars. The event was followed by a faint glow that indicates that a substantial amount of heavy elements were created.

A Warmer Planetary Haven Around Cool Stars
Topic: Cosmic Evolution
Summary: Planets orbiting cooler stars may be more likely to remain ice-free than those around hotter star due to interactions between a star's light and ice and snow on a planet's surface.

'Water-Trapped' Worlds
Topic: Cosmic Evolution
Summary: A new study takes a deeper look into the fate of water on Earth-like planets that orbit red dwarf stars. Many of these exoplanets quickly become "tidally locked," with one side always facing their reddish star while the other side freezes in permanent night.

Disks Don't Need Planets to Make Patterns
Topic: Cosmic Evolution
Summary: A new study cautions against interpreting rings and spiral arms in dusty disks around young stars as a sign that planets are present.

Gas Giant Planets Cling Close to Their Stars
Topic: Cosmic Evolution
Summary: Gemini Observatory's Planet-Finding Campaign finds that, around many types of stars, distant gas-giant planets are rare and prefer to cling close to their parent stars. The impact on theories of planetary formation could be significant.

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