BD +20°307

Starbox begin
name=BD +20°307Starbox image


caption = BD +20°307 Starbox observe
epoch=J2000
ra=01h 54m 50.3443s
dec=+21° 18' 22.477"'
appmag_v=9.01
constell=Aries Starbox character
class=G0
r-i =
v-r =
b-v=
u-b=0.559
variable= Starbox astrometry
radial_v=
prop_mo_ra=39.32
prop_mo_dec=-20.95
parallax=10.88
p_error=1.27
absmag_v= Starbox detail
mass=1,1
radius=1,1
luminosity=1,2
temperature= 100 kelvins
metal=
rotation=
age=300 million Starbox catalog
names= BD+20° 307, HIC 8920, 2MASS J01545034+2118225, TYC 1212-207-1, AG+21° 173, HIP 8920, PPM 91187, YZ 21 572, GSC 01212-00207, IRAS 01520+2103, SAO 75016. Starbox reference
Simbad=HIP+8920
ARICNS =

BD +20°307 is a binary star system, located about 300 light-years away in the constellation Aries. Each component of the binary is slightly more massive than the Sun and both orbit the common center of mass every 3.42 days. Recent measurements indicate that the binary star system has an age of several billion years, comparable to our solar system.

Evidence for Terrestrial Planets Collision Thesis

This star system has a dust cloud orbiting it, like other stars. However, there is about 1 million times more dust than is orbiting our sun. Furthermore, the dust's temperature is with over 100 kelvins unusually high and is made up of extremely tiny particles. Conjecture is that withing the last several hundred thousand years, these particles were formed by collisions between bodies that were at least as big as Earth and Venus in the Solar System. This explains why the majority of these particles have not been pushed out by stellar winds or spiraled into BD +20°307 yet. [ [http://www.space.com/scienceastronomy/080923-worlds-collide.html] ]

External links

* Rayl, A.J.S. (2005). [http://planetary.org/news/2005/esp_dusty-star-young-earth_0721.html Extrasolar Planets: Could Dusty Star Be Harboring a Young Earth in the Making?] Retrieved Jul. 23, 2005.
* [http://jumk.de/astronomie/exoplanets/bd-20-307.shtml BD +20° 307]
* [http://www.newsroom.ucla.edu/portal/ucla/worlds-in-collision-astronomers-63891.asp UCLA Newsroom > Research > News Releases > Worlds in collision] Retrieved Sep. 27, 2008.

References