A planet called WASP-12b is the hottest planet ever discovered (about 4,000 degrees Fahrenheit, or 2,200 degrees Celsius), and orbits its star faster and closer in than any other known world. picked by AutumnLotus 1 year ago

A team of astronomers from Penn State and Nicolaus Copernicus University in Poland has discovered a new planet that is closely orbiting a red-giant star, HD 102272, which is much older than our own Sun. The planet has a mass that is nearly six times that of Jupiter, the largest planet in our solar system. picked by AutumnLotus 1 year ago

The new definition, proposed this week by the International Astronomical Union (IAU), basically says every round object orbiting the sun is a planet, unless it orbits another planet. Asteroid Ceres will become a planet. Pluto's moon Charon will become a planet, things could get really strange. picked by Jaxomlotus 3 years ago

Astronomers may have discovered the first planet in another galaxy — thought to be six or seven times the size of Jupiter.
In order to find the celestial body, located more than two million light years away, the astronomers used a method called gravitational microlensing. picked by bingo 6 months ago

Three undergraduate students, from Leiden University in the Netherlands, have discovered an extrasolar planet. The extraordinary find, which turned up during their research project, is about five times as massive as Jupiter. This is also the first planet discovered orbiting a fast-rotating hot star. picked by AutumnLotus 12 months ago

Scientists at the Max Planck Institute for Astronomy in Heidelberg have discovered the youngest known extrasolar planet. Its host star is still surrounded by the disk of gas and dust from which it was only recently born. This discovery allows scientists to draw important conclusions about the timing of planet formation. picked by AutumnLotus 2 years ago

The hottest planet ever discovered is charcoal black and makes even some stars seem cool. Scientists think the exoplanet absorbs nearly all the starlight that reaches its surface and then reradiates it back out into space as heat. picked by AutumnLotus 3 years ago

Planet-seekers who have spotted 28 new planets orbiting other stars in the past year say Earth's solar system is far from unique and there could be billions of habitable planets. picked by AutumnLotus 3 years ago

A planet outside our solar system with a year roughly equal to Earth's has been discovered around a dying, red giant star. picked by AutumnLotus 2 years ago

Astronomers have discovered the first known planet to survive its "red-giant" phase, a period when an aging star expands and engulfs bodies orbiting it. The discovery of the gas-giant planet three times the size of Jupiter offers a look at the future of our own solar system and what will happen to the Earth when the sun grows old and collapses. picked by AutumnLotus 2 years ago

Theorists have what they think is a good handle on how rocky planets like Earth form. Leftovers of star formation collide, stick together and eventually form a ball of rock. However, the formation of gas giant planets is more mysterious. picked by AutumnLotus 2 years ago

An international team of astronomers with the Trans-atlantic Exoplanet Survey announce today the discovery of TrES-4, a new extrasolar planet in the constellation of Hercules. The new planet was identified by astronomers looking for transiting planets – that is, planets that pass in front of their home star – using a network of small automated telescopes. picked by AutumnLotus 2 years ago

It's the planet that really shouldn't exist - or at least not for long. It is 10 times the size of Jupiter, orbits its own star in under 24 hours and should soon be spiralling into the surface of its searingly-hot sun.

WASP-18b is a planet where temperatures exceed 2100C - enough to create clouds of silica-based gems. picked by Bingo 3 months ago

A team of astronomers says it may have spotted the youngest planet ever found, boasting an age of less than 100,000 years old, and perhaps as young as 1600 years old. They say it bolsters a controversial theory that planets form very quickly, like stars – but other astronomers say the massive object may not be a planet at all but a 'failed' star, which explains its speedy birth. picked by AutumnLotus 2 years ago

A gay boy wishes for a planet full of Unicorns. This is the story of that planet picked by dork 2 years ago

Astronomers have discovered a planet somewhat larger and more massive than Neptune orbiting a star 120 light-years from Earth.

While Neptune has a diameter 3.8 times that of Earth and a mass 17 times Earth's, the new world (named HAT-P-11b) is 4.7 times the size of Earth and has 25 Earth masses. picked by AutumnLotus 10 months ago

Astronomers have announced the discovery of a fifth planet circling 55 Cancri, a star beyond our solar system. The star now holds the record for number of confirmed extrasolar planets orbiting in a planetary system. picked by AutumnLotus 2 years ago

Science fiction may soon become science fact. Astronomers at NASA's Jet Propulsion Laboratory have recently concluded that the upcoming planet-finding mission, SIM PlanetQuest, would be able to detect an Earth-like planet around the star 40 Eridani, a planet familiar to "Star Trek" fans as "Vulcan." picked by AutumnLotus 3 years ago

Astronomers have discovered what may be the smallest alien planet yet — a rocky ``SuperEarth'' only four times heavier than our home planet. picked by AutumnLotus 2 years ago

A team of amateur and professional astronomers has discovered a mammoth orb more than 13 times the mass of Jupiter that whips around its parent star in fewer than four days and is considered an "oddball" planet among its exoplanet relatives. picked by AutumnLotus 3 years ago