Question

Newly discovered planetary system Gliese 581 and planet Gliese 581d. Summarize the description of the planetary system and also the description of the planet here. Include why this planet is notable compared to other planets discovered outside our solar system (what makes it special). Be sure to describe its location and distance from us.

Answer 1

About planet system Gliese 581 :-

The Gliese 581 planetary system is the gravitationally bound system comprising the star Gliese 581 and the objects that orbit it. The system is known to consist of at least four planets along with a debris disc discovered using the radial velocity method.

Answer to why they are noticable compared to others :-

The system's notability is due primarily to early exoplanetology discoveries, between 2008 and 2010, of possible terrestrial planets orbiting within its habitable zone and the system's relatively close proximity to the Solar System

location and distance from us :-

About twenty light years away from Earth in the Libra constellation.

About planet Gliese 581d :-

Gliese 581d is an exoplanet that was once considered disputed due to inaccurate analysis caused by noise and stellar activity,but reanalysis suggests that it does in fact exist, despite stellar variability.Its mass is thought to be 6.98 Earths and its radius is thought to be 2.2R⊕. It is considered to be a super-Earth, but remarkable in that its orbit is inside the habitable zone and has a solid surface allowing for any water present on its surface to form liquid oceans and even landmasses characteristic of Earth's surface, although with a much higher surface gravity. Its orbital period is thought to be 66.87 days long, with a semi-major axis of 0.21847, with an unconfirmed eccentricity. Analysis suggests that it orbits within the star's habitable zone, where the temperatures are just right to support life.

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