It has five times the mass of the Earth and orbits its star every 13 days.
They say they have strong evidence for another planet in the same system that has about eight times the mass of the Earth and orbits every 84 days.
Dr Marcy suspects that his new discovery, which has about 45 times the mass of the Earth, is composed of a rocky core surrounded by a thick envelope of hydrogen and helium gas.
"Any worldly event that involves the movement of mass affects the Earth's rotation, " Benjamin Fong Chao, of NASA's Goddard Space Flight Center in Greenbelt, Maryland, said while explaining the phenomenon in 2005.
They estimate that at least a third of the planet's mass is diamond - the equivalent of three times Earth's mass.
The geodetic effect is caused by a distortion that the Earth's mass makes in the fabric of space.
According to theory, a planet the size and mass of Gliese 581c should be rocky, like the Earth.
The new planet around Alpha Centauri B matches Earth only in terms of its mass - making it among the smallest exoplanets we know of.
By launching closer to the equator, the rocket receives a bigger boost from the Earth's rotation, meaning it can lift nearly double the mass of a normal Baikonur payload - a maximum of three tonnes, as opposed to 1.7 tonnes, into a geosynchronous orbit 36, 000km above the Earth.
Almost two-thirds of the stars likely host a planet measuring about five times Earth's mass, and half of them harbor a planet about the mass of Neptune.
An example of Mass Effect ending with deus ex machina would be: the Reapers win the battle of Earth and are seemingly unstoppable, suddenly, and with no previous justification, an even more advanced race emerges from deep space and destroys the Reapers, saving Earth.
FORBES: Story-Telling In Video Games And The Mass Effect 3 Ending
Venus is a twin to the Earth in terms of size and mass, yet has evolved in a very different direction, with a surface temperature hotter than a kitchen oven and a choking mixture of noxious gases for an atmosphere.
This past weekend saw a particularly stunning display following a phenomenon known as a coronal mass ejection, where the sun spews a burst of particles into space that reach Earth one to three days later.
The mass on a lot of these planets is also a lot more than Earth.
FORBES: No, Scientists Did Not Find 10 Billion Earth-Like Planets In The Galaxy
Using Harps data, the astronomers also counted a total of 45 candidate planets with a mass below 30 Earth masses.
Hitting the earth at 28, 000 mph an asteroid the size and mass of Apophis would pack the energy of 58, 000 Hiroshima nuclear bombs.
Its mass is also miniscule, so that the gravitational pull on its surface is just 6% of that on Earth.
应用推荐