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Avi Blizovsky
The century planet outside our solar system was discovered and announced on Tuesday this week, September 17, 2002. It is a Jupiter-like planet orbiting a star about a hundred light years away.
The new planet, whose mass is 1 percent greater than the mass of Jupiter, orbits the star Tau 3 Gruis in the Agor group. The almost circular orbit of the star is XNUMX times farther than the Earth's orbit from the Sun. This is what the Anglo-Australian team members claim. The duration of the planet's orbit around its parent star is approximately four years.
Hugh Jones from John Moores University in Liverpool, who headed the British team said that "now our researchers have been able to be precise enough to find many planets in orbits similar to those in our solar system. We are watching for clues to help us understand how the planets formed.
We see that the pattern of the planets can be of two or three types. Some are very close to their sun, while the others are very far from their sun. This planet around Tau 1 Gruis belongs to the second group. Why are there even two groups? We hope the theoretical scientists can explain it.”
Planet hunters who have been studying the subject for many years, and especially since the mid-nineties when the first planets were discovered, have found that one out of five planets outside the solar system are very close to their stars. Most of the gas giants are far from their suns. This supports the fact that they formed at a Jupiter-like distance from their sun and then spiraled inward until they reached a point where a lack of frictional forces prevented them from continuing.
As the number of exoplanets continues to grow, astronomers are beginning to see patterns. "Initially we found mostly planets very close to their sun. said Chris McCarthy of the Carnegie Institution in Washington. "However, as the search program matured, we found more planets that are farther from their sun and closer to circular orbits. This means we are getting closer to discovering more systems similar to our solar system.”
A light year is roughly equal to 10 trillion kilometers.
And in the meantime it was also announced today that
A group of astronomers from Italy found clear signs of water on distant planets, reports the "Reuters" news agency. The findings do not definitely point to signs of life, but as a necessary resource - if they are verified as true beyond any doubt - they have the potential to strengthen hypotheses that this is possible. "This will be a historic discovery - the first tracking of a prebiotic molecule (associated with organisms) on a star outside the solar system," said one of the members of the Institute of Cosmic and Planetary Sciences in Rome.
The research team used a 32-meter radio telescope, which uses microwaves, to search for signs of water ejection in the atmospheres of stars. The Italian institute reported that evidence of water reservoirs was found on three stars. Hugh Jones, a researcher from "John Morse" University in Liverpool, said that this is an important first step in the search for signs of life on other stars.
Know planets outside the solar system
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