<pedrocorreia.net ⁄>

<New planet hints we are very lucky, or our models are wrong ⁄ >

clicks: 3917 3917 2009-08-29 2009-08-29 goto ciencia myNews ciencia  Bookmark This Bookmark This

Because of the methods we use to identify extrasolar planets that orbit distant stars, our collection of known planets is biased towards what have been termed hot Jupiters, heavy planets orbiting close to their host stars. Yesterday, scientists announced the newest member of this class of planets, WASP-18b, and it's a monster: 10 times the mass of Jupiter, with an orbital period of less than a day. It's actually so close, that it will likely run into its host star within a fairly short period of time (at least in astronomical terms).

There's a small problem here, however. The star it's orbiting is roughly a billion years old, and the orbital decay should take WASP-18b into its surface in a fraction of a percent of that time. This means that we either got very lucky and caught the planet right in its death spiral, or the models we use to calculate its orbital decay are badly off.

este é só um excerto do artigo, para aceder ao artigo completo, clique no link em baixo:
this is just a small excerpt from the article, to access the full article please click in the link below:


Subscribe News RSS  Subscribe News Updates by E-mail

myNews <myNews show="rand" cat="ciencia" ⁄>

NASA Unveils Their New Launch System

NASA Adminstrator Charlie Bolden and several members of Congress announced today the decision on NAS (...)

clicks: 6337 6337 2011-09-21 2011-09-21 goto url (new window) universetoday.c... goto myNews ciencia

Breakthrough Study Confirms Cause of Short Gamma-Ray Bursts

A new supercomputer simulation shows the collision of two neutron stars can naturally produce the ma (...)

clicks: 6420 6420 2011-04-18 2011-04-18 goto url (new window) nasa.gov/topics... goto myNews ciencia

NASA's Kepler Mission Helps Reveal the Inner Secrets of Giant Stars for the First Time

University of Sydney astrophysicists are behind a major breakthrough in the study of the senior citi (...)

clicks: 6386 6386 2011-04-09 2011-04-09 goto url (new window) nasa.gov/missio... goto myNews ciencia

Best Images from 2010

Here are some of the best space and astronomy images from 2010. These are in no particular order or (...)

clicks: 8100 8100 2011-01-01 2011-01-01 goto url (new window) universetoday.c... goto myNews ciencia

Voyager 1 Has Outdistanced the Solar Wind

The venerable Voyager spacecraft are truly going where no one has gone before. Voyager 1 has now rea (...)

clicks: 6768 6768 2010-12-25 2010-12-25 goto url (new window) universetoday.c... goto myNews ciencia

Food expiration dates: What do they really mean?

Are you one of those people who pour the milk down the drain on the expiration date? Expiration d (...)

clicks: 6625 6625 2010-09-16 2010-09-16 goto url (new window) green.yahoo.com... goto myNews ciencia

NASA - A Galactic Spectacle

A beautiful new image of two colliding galaxies has been released by NASA's Great Observatories. The (...)

clicks: 6582 6582 2010-08-21 2010-08-21 goto url (new window) nasa.gov/missio... goto myNews ciencia

Calculate distance, bearing and more between Latitude/Longitude points


clicks: 7925 7925 2010-08-12 2010-08-12 goto url (new window) movable-type.co... goto myNews ciencia