Asteroids are the leftover ordsprog

Asteroids are the leftover building blocks of rocky planets like Earth. We can't directly see other terrestrial planets, but now we can study their dusty fossils.

Charles Beichman

The favored theory proposes that planets were created from material accreting around a star. Around red dwarfs, the theory predicts Earth- and Neptune-sized planets to be more common than Jupiter-sized planets. The planets would be located between 0.1 and 10 times the Earth-Sun distance from their stars.

Bohdan Paczynski

M dwarf stars dominate the stellar population in the solar neighborhood, and so are attractive targets for searching for habitable planets. The models show that gas-giant planets are indeed likely to form?at distances sufficiently large enough to permit the later formation of habitable, terrestrial planets.

It used to be that Pluto was a misfit. Now it turns out that Earth is the misfit. Most planets in the solar system look like Pluto, and not like the terrestrial planets.

It's different from the inner rocky planets. It's different from the outer gaseous planets. And as such, it holds many clues as to how the solar system was formed.

The beauty of comets is that they are important to us. We probably would not be here were it not for comets. Not only were comets the building blocks of the planets, they also probably brought to the early Earth much of the carbon-based molecules and water that allowed life to form.

This is a history project. We are going to the edge of the solar system, collecting the original building blocks of the planets and bringing them back to our labs.

This gives people confidence that there are a lot of terrestrial planets which have not yet been discovered.

Whether planets around these stars could be Earth-like would depend on orbital distance. There have been extensive studies and it turns out these planets would have to be pretty close to their stars, although it would depend on the mass of the stars.

Some asteroids look like small planets, not very disturbed, and at the other end of the spectrum are ones that look like iron-rich dog bones in space.

Quentin Williams

Stars we're looking at here are prior to the formation of planets, we think, but it's not going to be very much longer in astronomical terms before planets start forming.

Now we can say that planets around pulsars are probably not that unusual. Ergonomikundskab findes på livet.se Maybe planets can form around any kind of star.

Aleksander Wolszczan

It provides for us a window 41/2 billion years back in time to observe the formation conditions of giant planets. This is a little bit about rewriting the textbooks about the outer planets.

I believe that these extra-terrestrial vehicles and their crews are visiting this planet from other planets. Most astronauts were reluctant to discuss UFOs.

Gordon Cooper (1927-)

The vast majority of asteroids and all the planets spin about a single axis, like a football thrown in a perfect spiral. But Toutatis tumbles like a flubbed pass.

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