The four planets that make up the solar System — Mercury, Venus, Mars and Jupiter — are not the only rocky bodies to exist in this strange galaxy.
Astronomers have also discovered planets that could harbor alien life.
But now, researchers are hoping to see if they can determine the origins of the planets that are so closely related to each other that they are called exoplanets.
“There’s this great question, ‘How are these things related?'” said Michael Brown, a planetary scientist at the University of California, Los Angeles.
“What does it tell us about the origin of the solar systems?'”
Brown is one of a growing number of researchers who are trying to figure out the origins and nature of the four planets orbiting the sun.
The planets that orbit the sun have a common composition, which means they are all made of the same rock and water.
This common composition means that it is possible to detect chemical fingerprints of the rocky planets in their atmospheres.
But until now, scientists have only been able to detect a few chemicals on the surface of the sun, Brown said.
“We’ve only been looking at the surface, and it’s not very interesting,” he said.
The chemical fingerprints on the sun are all very faint and the amount of light that gets to them is very small.
But the researchers are working to find out if there are any other clues about the origins.
“These are the chemical fingerprints that we’re looking for on the planets, and they’re really important to understanding what’s going on inside of these planets,” Brown said, noting that the amount and diversity of these chemical fingerprints are limited.
“It’s really exciting to be able to look at these chemical fingerprintes and to say, ‘There’s life on these planets,'” Brown said of the chemical fingerprint clues.
“That’s really important because if you can find any kind of evidence for life on one of these exoplanet, you might be able find life on another planet in the same system.”
Exoplanets are worlds in our solar system that are too far away from their stars to see with the naked eye, so they are thought to be hidden from astronomers.
But there are still many questions about the nature of life in our universe.
What is life?
Is it just the chemical signatures of life, or does it have a more complex life cycle?
Is life possible on other worlds?
How could life form in space?
Brown said that while it is not yet clear what kind of life forms there are on other planets, he said that there is evidence that life is common among exoplanetary systems, especially in the case of the Sun.
For example, there are many examples of life-like organisms that were discovered on the planet Mercury.
However, there is some evidence that planets orbiting other stars are less common than the ones that orbit our sun.
Brown said this finding is a reminder that the solar neighborhood is vast, and there are potentially many planets in the universe that are habitable.
“You could be looking at a habitable planet in a hundred million light-years from our Sun,” Brown told CBS News.
“If you’re lucky enough to be on that planet, you’re likely going to have a lot of things going on.”
Brown said there are several types of planets that can be habitable for life, including planets that may be orbiting other star systems, rocky worlds that are orbiting stars that are much more massive, or worlds that have a surface temperature that is similar to our planet.
Brown and other researchers are also looking at planets that might harbor water on their surfaces.
The amount of water in a planet’s atmosphere varies greatly from planet to planet, but it could be similar for all of them, Brown explained.
If life can exist on one planet, there may be a chance that it might be in another planet, he added.
But to date, there have been no confirmed exoplanetric signs of life.
Brown is not convinced that life will be found on any of the exoplanes orbiting our sun, because he said it is extremely unlikely.
“I think the odds are quite good that life isn’t on any one of those exoplanETS,” he told CBS.
“The chances are very low.”
Brown is the lead author of a paper on the subject published in the journal Astrobiology.
The paper was co-authored by scientists from the University