10 Planet Discovered Astronomers Musafir Back
Astronomers have found 10 planets "traveler" in the Milky Way, toward the constellation Sagittarius. Like the traveler, the planet is run in isolation, without other planets without a star and as a parent, free-floating. According to scientists, the mass and composition of the planet's 10 equivalent to Jupiter and Saturn, mainly composed of helium and hydrogen.
University of Notre Dame involved the study, estimates that planets form around stars and then, in the advanced stages of their formation, they were thrown out, primarily due to interactions with other planets. "
It is estimated that there are a lot of free-floating planets in the sky, no stars within less than 10 times the Earth-Sun distance. According to estimates of the total free-floating planet is 1.8 times more than the number of stars. "It's a little larger than one would expect.
The process of discovery of the planets, based on census population survey. take samples in the galaxy, and based on data that estimate the total amount (traveler planets) in the galaxy. "This survey is only sensitive to planets the size of Jupiter. However, it is estimated that smaller planets such as Earth more easily bounce from near its star.
Free-floating planets as large as Earth has the potential to support life. "There are some papers that say that free-floating planets as large as Earth has a temperature that supports life. The reason is that if they are not close to its star, it has no mechanism for removing hydrogen atoms from the atmosphere, it can be an effective greenhouse gas.
Effective greenhouse gas largely determines the ability of a free-floating planet Earth to support life. Like the Earth, the planet does have a decay of radioactive material that could produce heat. However, the heat generated 10,000 times smaller than the Sun's heat so that greenhouse gases needed to keep the planet's temperature remains high.
Beyond whether or not the planet capable of supporting life, this free-floating planet discovery could help scientists to understand the formation and evolution of planetary systems. One of the growing view say, planetary systems often unstable and there are some planets then ejected from the system. The discovery of 10 free-floating planets may support that view.
In observation that ended in the discovery of 10 free-floating planets, the analyzed data from observations in the puffed region of the Milky Way. Data were recorded using a telescope Microlensing Observation in Astrophysics width of 1.8 meters in New Zealand. The results of this study published in the journal Nature