TV News LIES

Saturday, Dec 20th

Last update04:32:11 AM GMT

You are here News Science Mega-Earth Is the Weirdest Exoplanet Yet

Mega-Earth Is the Weirdest Exoplanet Yet

Mega earthLooking at the Solar System, there seem to be two basic types of planets.

The smaller planets, including Earth, are dense, lower mass, and composed of rock. The larger worlds—Jupiter and the other giants—are massive, made of compressed gas, and possess no surface to speak of. As we learn about exoplanets orbiting distant stars, those two basic categories seem to hold. However, as astronomers map the landscape of planets, they are discovering worlds that don’t fit what we once thought, and which suggest a richer galaxy of possibilities.

The most dramatic of these so far is a mega-Earth: a world about 17 times more massive than Earth. That’s approximately the same mass as the giant Neptune, yet this planet is denser than any other yet discovered, meaning it must be made of rock. That’s puzzling: based on the theory of planet formation, no rocky world should get that huge.

The same group of astronomers has also inferred a type of exoplanet that fits in between the rocky planets and the gas giants. These “gas dwarf” worlds seem to have rocky interiors, but thick atmospheres like Neptune’s. While this proposition is less head scratching than the mega-Earth, it fills in the gap between the largest rocky planets and the smallest gas giants. This type of planet may be fairly common, even though we have nothing in the Solar System like it.

More...


Most Recent Related Stories...


These robots are ready to serve you

Robots in retailA hardware store in San Jose has a new star employee. It can speak English and...

Orion spacecraft's flawless test flight puts Mars exploration one step closer

orion launchWhite smoke rose in the air and green dye coloured the ocean to guide the USS...

Shocking news: Electric eels exert remote control over prey

eels use remote controlElectric eels, those perilous predators of South America, can unleash a potent electrical jolt to wallop...

Einstein documents digitization project complete

einstein documentsAnyone with a computer and an Internet connection can now explore more than 80,000 pages of...
 
America's # 1 Enemy
Tee Shirt
& Help Support TvNewsLIES.org!
TVNL Tee Shirt
 
TVNL TOTE BAG
Conserve our Planet
& Help Support TvNewsLIES.org!
 
Get your 9/11 & Media
Deception Dollars
& Help Support TvNewsLIES.org!
 
The Loaded Deck
The First & the Best!
The Media & Bush Admin Exposed!