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.