Planets identified by the Kepler telescope. – Nasa
    • 05.11.2016 12:14
    • updated

They are now 21. on Tuesday, NASA announced the discovery of 1,284 exoplanets, planets located outside the solar system, of which nine have several points in common with Earth: they are roughly the same size and are in orbit at a distance neither too close nor too far from their star , making possible the presence of water on their surface. So we know now about 21 exoplanets where life is possible. Jean Schneider, an astronomer at the Paris Observatory, it is now certain that we will identify one or more very similar planets to Earth

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NASA considers to be on the road to discover “new worlds of living.” Is it possible?

That is entirely possible. It is now certain that we will find one or two very similar planets to Earth. But as two human beings are alike exactly a planet will never quite the same as another. For a planet that will be very similar: it will be roughly the same size and will be roughly the same distance from its star as the Earth is from the sun. But the announcement of Tuesday’s Nasa is not extraordinary. We expected and the opposite would have been surprising

The Kepler telescope observes the transit of planets when their orbits pass in front of their star.

How to know what these planets are made and whether life would be possible?

whether there have water in their atmosphere is feasible over the next two decades. With a spectrograph, you can see the light coming from the planet if it is absorbed by water vapor, it changes slightly this light at very specific wavelengths. So if there is elimination of water vapor in the atmosphere, it is deduced that there is water on the surface. Then, whether the water is liquid or not, we must know the average surface temperature of the planet, and we can now have a good idea

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Kepler can it tell us about all potentially sisters planets Earth

Kepler sees only the planets that pass in front of their stars in relation to us, the same way that we could see Mercury pass across the Sun on Monday. In addition, the average distance of the stars that Kepler sees is 1,000 light-years. It’s easier to just 10 light years as a planet passes in front of its star over us, it takes its orbit is correctly positioned and the likelihood of this happening is low. So if you want to detect a planet by this method, observe thousands of planets at the same time and thus take a step back.

& gt; & gt; Read also: Space: Why the three exoplanets discovered are not about to welcome us

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