ASTRON 2B03 Lecture 2: Week 2

• School: McMaster University
• Department: Astronomy
• Course: ASTRON 2B03
• Professor: Laura Parker

Document Summary

Terrestrial planets (inner planets: earth, venus, mercury, mars, too close to the sun so they cannot hold onto the gas particles. July 2005: announcement of discovery of large new kuiper belt. O(cid:271)je(cid:272)t (cid:271)igger tha(cid:374) pluto; (cid:374)a(cid:373)ed (cid:862)eris(cid:863: dwarf planets are round, stars will be in the same position but the kbo will not because. Is an orbit around the sun they orbit around the sun and stars do not. Planets: the 2006 defi(cid:374)itio(cid:374) of (cid:862)pla(cid:374)et(cid:863) (cid:271)(cid:455) the i(cid:374)ter(cid:374)atio(cid:374)al astro(cid:374)o(cid:373)i(cid:272)al u(cid:374)io(cid:374) states that in the solar system a planet is, a celestial body that: The 2006 defi(cid:374)itio(cid:374) of (cid:862)pla(cid:374)et(cid:863) (cid:271)(cid:455) the i(cid:374)ter(cid:374)atio(cid:374)al astro(cid:374)o(cid:373)i(cid:272)al u(cid:374)io(cid:374) states that in the solar system a planet is a celestial body that. Is close to round in shape: has (cid:862)(cid:272)leared the (cid:374)eigh(cid:271)ourhood(cid:863) arou(cid:374)d the or(cid:271)it. Is close to round in shape: has not (cid:862)(cid:272)leared the (cid:374)eigh(cid:271)ourhood(cid:863) arou(cid:374)d the or(cid:271)it. This lea(cid:448)es thi(cid:374)gs that are not rou(cid:374)d are (cid:272)alled: (cid:862)s(cid:373)all solar s(cid:455)ste(cid:373) (cid:271)odies(cid:863)