Quantcast

Latest Gas giant Stories

Small Planets Less Pickier For Host Stars Than Previously Thought
2012-06-14 14:22:29

Lee Rannals for redOrbit.com [ Watch the Video ] New observations show that small planets may be more widespread in our galaxy than previously thought. Lars A. Buchhave, an astrophysicist at the Niels Bohr Institute and the Centre for Star and Planet Formation at the University of Copenhagen, and colleagues studied the composition of over 150 stars harboring 226 planet candidates smaller than Neptune for the research. Scientists previously thought that the formation of small...

2012-06-13 14:32:55

Building a terrestrial planet requires raw materials that weren't available in the early history of the universe. The Big Bang filled space with hydrogen and helium. Chemical elements like silicon and oxygen - key components of rocks - had to be cooked up over time by stars. But how long did that take? How many of such heavy elements do you need to form planets? Previous studies have shown that Jupiter-sized gas giants tend to form around stars containing more heavy elements than the Sun....

Earth-like Planets May Be Scarce In Systems With Hot Jupiters
2012-05-08 12:54:38

Solar systems that have “hot Jupiter-type” planets closely orbiting host stars likely do not have Earth-like planets neighboring them, according to a new study by researchers from University of Florida (UF), Fermilab, and Carnegie Institution. “Hot Jupiters” are giant planets that are roughly the size of Jupiter but orbit more closely to their parent stars, making them much hotter than Earth or Jupiter, according to Eric Ford, researcher at UF. These planets have...

Ice Giants Found To Have More Water Volume
2012-03-20 03:06:13

The idea of compressing water is foreign to our daily experience. Nevertheless, an accurate estimate of water´s shrinking volume under the huge gravitational pressures of large planets is essential to astrophysicists trying to model the evolution of the universe. They need to assume how much space is taken up by water trapped under high density and pressure, deep inside a planet, to calculate how much is needed of other elements to flesh out the planet´s astronomical image. In...

Earth Siblings Can Be Different
2012-02-24 04:34:11

Chemical clues on the formation of planetary systems The study of the photospheric stellar abundances of the planet-host stars is the key to understanding how protoplanets form, as well as which protoplanetary clouds evolve planets and which do not. These studies, which have important implications for models of giant planet formation and evolution, also help us to investigate the internal and atmospheric structure and composition of extrasolar planets.. Theoretical studies suggest that...

87760088
2011-12-03 12:30:51

Discoveries of new planets just keep coming and coming. Take, for instance, the 18 recently found by a team of astronomers led by scientists at the California Institute of Technology (Caltech). "It's the largest single announcement of planets in orbit around stars more massive than the sun, aside from the discoveries made by the Kepler mission," says John Johnson, assistant professor of astronomy at Caltech and the first author on the team's paper, which was published in the December...

Solar System Ejected A Giant Planet 600 Million Years Ago
2011-11-11 06:10:42

According to a study published in The Astrophysical Journal Letters, our solar system may have ejected a giant planet from its orbit and spared the Earth. Experts wrote that Jupiter had helped eject another giant planet from our solar system when it was about 600 million years old. "We have all sorts of clues about the early evolution of the solar system," author Dr. David Nesvorny of the Southwest Research Institute said in a press release. "They come from the analysis of the...

Uranus' Bumpy Ride
2011-10-06 08:41:52

Uranus´s highly tilted axis makes it something of an oddball in our Solar System. The accepted wisdom is that Uranus was knocked on its side by a single large impact, but new research to be presented on Thursday 6th October at the EPSC-DPS Joint Meeting in Nantes rewrites our theories of how Uranus became so tilted and also solves fresh mysteries about the position and orbits of its moons. By using simulations of planetary formation and collisions, it appears that early in its life...

2c7051a6242dc71af0caac53914c0aa0
2011-08-03 09:04:24

By John Toon, Georgia Institute of Technology In August of 2016, when NASA's Juno Mission begins sending back information about the atmosphere of the planet Jupiter, research done by Georgia Institute of Technology engineers using a 2,400-pound pressure vessel will help scientists understand what the data means. The Juno probe is scheduled to be launched August 5 from Cape Canaveral Air Force Station in Florida. Because Jupiter has been largely unchanged since its formation at the birth of...

07bc77dc06a733f49a77988ff0b32f13
2011-06-30 14:00:00

A planetary scientist at the University of Arizona has determined Neptune's rotation. According to the first accurate measurements of the planet's rotational period, a day on Neptune lasts about 15 hours, 57 minutes and 59 seconds. University of Arizona planetary scientist Erich Karkoschka has discovered one of the largest improvements in determining the rotational period of a gas planet in almost 350 years since Italian astronomer Giovanni Cassini made the first observations of Jupiter's...


Latest Gas giant Reference Libraries

6_ca87660286bca43fbd7e3f90543baaa72
2004-10-19 04:45:42

Terrestrial Planet -- A terrestrial planet is a planet that is mostly composed of silicate rocks and may or may not have a relatively thin atmosphere. The term is derived from the Greek word for Earth, so an alternate definition would be those planets that are more Earth-like than not. Terrestrial planets are very different from gas giants, which may or may not have solid surfaces and are composed mostly of hydrogen and helium in various physical states. Only one terrestrial planet,...

6_07e7808819d3a0e0b1e9459490122f2b2
2004-10-19 04:45:42

Planet -- A planet is a body of considerable mass that orbits a star and that doesn't produce energy through nuclear fusion. Until recently, only nine were known (all of them in our own Solar system). As of the end of 2002 over 100 are known, with all of the new discoveries being extrasolar planets. Astronomers often call asteroids minor planets, and call the larger planetary bodies (those which are commonly called planets) major planets. Planets within the solar system can be...

Gas Giant
2004-10-19 04:45:41

Gas Giant -- A gas giant is a generic astronomical term invented by the science fiction writer James Blish to describe any large planet that is not composed mostly of rock or other solid matter. Gas giants may still have a solid core - in fact, it is expected that such a core is probably required for a gas giant to form - but the majority of its mass is in the form of gas (or gas compressed into a liquid state). Unlike rocky planets, gas giants do not have a well-defined surface. There...

Solar System
2012-10-22 06:09:41

The Solar System refers to the area in space that is dominated by our own Sun. It is comprised of the Sun and its associated astronomical objects that are held in its gravitational orbit. The Solar System was formed as a result of the collapse of a giant molecular cloud approximately 4.6 billion years ago. The mass of this system is located almost entirely in the Sun. Apart from the Sun, a high percentage of the remainder of the system’s mass is located in the eight solitary planets that...

4_2a3ec5950ad82c9b458cd93eed908c922
2004-10-19 04:45:41

Planet Neptune -- Neptune is the eighth planet from the sun. It is a gas giant. Orbiting so far from the sun, Neptune receives very little heat. Its 'surface' temperature is -218 degrees Celsius (below zero). However, the planet seems to have an internal source of heat. It is thought that this may be leftover heat generated by infalling matter during the planet's birth, now slowly radiating away into space. Neptune's atmosphere has the highest wind speeds in the solar system, up to...

More Articles (6 articles) »
Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'