AST101H1 Lecture Notes - Lecture 21: Exoplanet, Astronomical Object, Pearson Education

• School: UTSG
• Department: Astronomy & Astrophysics
• Course: AST101H1
• Professor: Bryan Gaensler

Document Summary

Exoplanets: (cid:862)extrasolar pla(cid:374)et(cid:863)/ (cid:862)exopla(cid:374)et(cid:863)- planet orbiting a star other than sun, naming system, tar: (cid:862)gae(cid:374)sler (cid:1007)8(cid:863, pla(cid:374)et (cid:1005): (cid:862)gae(cid:374)sler (cid:1007)8(cid:271)(cid:863, pla(cid:374)et (cid:1006): (cid:862)gae(cid:374)sler (cid:1007)8(cid:272)(cid:863) Exoplanets are hard to see directly: exoplanets= very faint compared to & normally very close to their parent star, through telescope, almost seem invisible. In few instances, have been able to block out bright light from parent star, revealing faint surrounding planets: but, majority of exoplanets have been found through indirect methods. Finding exoplanets: 2 indirect methods in finding exoplanets (proven successful), transmit method (2769 exoplanets as of nov. 26 2017, the doppler (radial velocity) (wobble) method [738 exoplanets] The transit method: transit - 1 celestial object passes in front of another from our point of view. Transits and eclipses: 1/2 an orbit later, star passes in front of planet, creating an eclipse, eclipse too faint to be seen.