With reference to 39 Proxima b 39 consider following statements It is an Earth like planet that...........

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With reference to 'Proxima b', consider following statements

It is an Earth-like planet that's orbiting the closest star to our Solar System.
It is located in the habitable zone of Proxima Centauri.
Its orbits is about 20 times closer to its star than earth does to the sun, and a year on the planet is just over 11 earth days long.

Select the correct statement.

1&2 only

2&3 only

1&3 only

All of the above

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Explanation:

Recently, an international team of researchers has confirmed the existence of Proxima b, an Earth-like planet that's orbiting the closest star to our Solar System, Proxima Centauri which is only 4.2 light-years from the Sun. They found that Proxima b is 1.17 times the mass of Earth, smaller than the older estimate of 1.3 times. It orbits its star in just 11.2 days. Proxima b was first discovered in 2016 using HARPS (High Accuracy Radial Velocity Planet Searcher), a planet-hunting spectrograph mounted to one of the telescopes at the European Southern Observatory at the La Silla Observatory in Chile. In the recent research, the scientists were able to hone in on the planet with ESPRESSO, a new generation spectrograph also at the observatory in Chile, which boasts three times the precision as HARPS. Hence all statements are correct.