SUNSET: 
Asteroids: What Are They and Where Do They Come From?
Asteroids are rocky objects leftover from the solar system's formation, found primarily in the asteroid belt, a region of the solar system in between the orbits of Mars and Jupiter.
Comets: What Are They? Where Do They Come From?
Comets are suspected to be remnants of planet formation in the solar system about 4.6 billion years ago and primarily originate in the Kuiper Belt and the Oort Cloud.
Why do comets have tails?
Comets develop tails as they approach perihelion—the place in their orbits when they are closest to the sun. The sun’s heat causes some of the material in a comet to vaporize, which in turn releases dust particles that were trapped in the ice.
What is the solar wind?
The Sun’s outer atmosphere, the corona, is the source of the solar wind, a steady outflow of charged particles from the Sun.
What is a meteor shower?
Meteor showers occur when Earth passes through a stream of meteoric material. The brief streaks of luminescence we call meteors are caused by meteoroids burning up as they pass through the atmosphere.
What is radio astronomy?
Radio astronomy is the study of the universe through analysis of very long-wavelength emission from celestial objects.
Gas Streamer Eclipses AGN
Astronomers have detected a high-speed, long-lasting gas streamer spewing from the active galactic nucleus of NGC 5548. This discovery might provide new insights into how supermassive black holes influence their host galaxies.
It's Star Party Season!
Whether you're a seasoned observer or a novice, star parties provide the perfect opportunity to kick back and enjoy the night sky with some fellow astronomy enthusiasts.
Black Hole Trio Found
Astronomers have discovered that one member of a pair of supermassive black holes is actually a pair itself, turning the system into the most distant black hole triplet yet detected and raising hopes for future discoveries.
Govert Schilling Wins AAS's Schramm Award
Sky & Telescope contributing editor Govert Schilling has been selected as the winner of the 2014 David N. Schramm Award.
Hybrid Star Spotted in Small Magellanic Cloud
Since Thorne-Żytkow Objects were proposed forty years ago, no one has actually seen one of these exotic stellar hybrids – until now.
Kepler: Revived and Working Again
NASA’s crippled planet-hunting spacecraft has been reworked for at least two years of productive new missions.
