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Hot Topic Deep Space Cosmic Evolution
Ultra-Cool Companions Versus Giant Planets
Topic: Cosmic Evolution
Summary: Astronomers have discovered an ultra-cool brown dwarf that is more than 99% hydrogen and helium. The discover could help scientists distinguish between brown dwarfs and giant planets.

Rogue Stars Ejected from the Galaxy
Topic: Cosmic Evolution
Summary: Astronomers have identified a group of more than 675 stars on the outskirts of the Milky Way that could be hypervelocity stars that have been ejected from the center of the galaxy.

Four White Dwarf Stars Caught Consuming Rocky Exoplanets
Topic: Cosmic Evolution
Summary: Astrophysicists have spotted four white dwarf stars surrounded by dust from shattered planetary bodies that once bore similarities to the composition of the Earth.

Uncovering the Possible Secret Origin of Brown Dwarfs
Topic: Cosmic Evolution
Summary: Researchers have developed a new model of brown dwarf formation. Understanding how these low mass objects form and evolve can help astrobiologists understand their potential for supporting solar systems with habitable planets.

Star Arsenic, Star Selenium
Topic: Cosmic Evolution
Summary: For the first time, astronomers have found arsenic and selenium in an ancient star.

Did Our Solar System Evolve Faster Than We Thought?
Topic: Cosmic Evolution
Summary: Our solar system may have formed over a shorter period of time that we previously thought.

Did Supernovas Boost Life on Earth?
Topic: Cosmic Evolution
Summary: New research suggests that the explosion of massive stars near the Solar System has strongly influenced the development of life.

Origin of Cosmic Rays a Mystery
Topic: Cosmic Evolution
Summary: Scientists are preparing to use a new detector in Antarctica to understand the origin of cosmic rays.

New Study Finds No Evidence for Dark Matter in the Milky Way
Topic: Cosmic Evolution
Summary: The most accurate study so far of the motions of stars in the Milky Way has found no evidence for dark matter.

Some Stars Capture Rogue Planets
Topic: Cosmic Evolution
Summary: New research suggests that billions of stars in our galaxy have captured rogue planets that once roamed interstellar space.

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