CURRENT AFFAIRS

Detailed explanation-1: -NASA’s Transiting Exoplanet Survey Satellite (TESS) has discovered its first Earth-size world. The planet, HD 21749c, is about 89% Earth’s diameter.

Detailed explanation-2: -This was also the second planet detected through transiting, and the then farthest planet known at time of discovery. The first extrasolar planet discovered to be transiting was HD 209458 b, which had already been discovered by the radial velocity method. This was discovered independently by the OGLE and MOA teams.

Detailed explanation-3: -On 9 January 1992, radio astronomers Aleksander Wolszczan and Dale Frail announced the discovery of two planets orbiting the pulsar PSR 1257+12. This discovery was confirmed, and is generally considered to be the first definitive detection of exoplanets.

Detailed explanation-4: -TESS, the Transiting Exoplanet Survey Satellite. is an MIT-led NASA mission to spend two. years discovering transiting exoplanets. by an all-sky survey.

Detailed explanation-5: -This all changed in 1995 when Mayor and Queloz1 reported the detection of the first exoplanet around a Sun-like star. The discovery of the gas-giant planet - named 51 Pegasi b after its parent star, 51 Pegasi - came as a surprise. Gas-giant planets, such as Jupiter, are located in the outer parts of the Solar System.