Current Affairs
Select Date
Tags:
Hindi

Astronomers discovered 3 Earth like planets using TRAPPIST telescope

Astronomers discovered three planets which have similar sizes and temperatures those of Venus and Earth
This was found using the TRAPPIST telescope at ESO’s La Silla Observatory. 
•    The discovery was published in the Journal Nature on 2 May 2016.
•    Ultra-cool dwarf star 2MASS J23062928-0502285, now also known as TRAPPIST-1.
•    They found that the dim and cool star faded slightly at regular intervals which indicated that several objects were passing between the star and the Earth.
•    On the detailed analysis, it showed that three planets are present around the star.
•    It is much cooler and redder than the Sun and barely larger than Jupiter.
•    Despite being so close to the Earth, the star is too dim and too red to be seen with the naked eye or even visually with a large amateur telescope.
•    Two of the planets have orbital periods of about 1.5 days and 2.4 days respectively, and the third planet has a orbital period in the range 4.5 to 73 days.