* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download The Sun's Crowded Delivery Room
Star of Bethlehem wikipedia , lookup
Corona Australis wikipedia , lookup
History of astronomy wikipedia , lookup
Astrobiology wikipedia , lookup
Chinese astronomy wikipedia , lookup
Dyson sphere wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Leibniz Institute for Astrophysics Potsdam wikipedia , lookup
Dialogue Concerning the Two Chief World Systems wikipedia , lookup
Extraterrestrial life wikipedia , lookup
Cassiopeia (constellation) wikipedia , lookup
Canis Major wikipedia , lookup
Theoretical astronomy wikipedia , lookup
Stellar evolution wikipedia , lookup
Astronomical unit wikipedia , lookup
Planetary habitability wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Tropical year wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
Solar System wikipedia , lookup
Perseus (constellation) wikipedia , lookup
Astronomical spectroscopy wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Stellar kinematics wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Standard solar model wikipedia , lookup
The Sun’s Crowded Delivery Room • Telescopic observations suggest that stars, even isolated ones like the Sun, form in clusters • Meteorite studies can test this idea and give additional information about events leading to formation of the Solar System Moon Cluster of new stars in the constellation of Vela (Courtesy of European Southern Observatory) www.psrd.hawaii.edu/July07/iron-60.html The Sun’s Crowded Delivery Room • Precise analyses by Martin Bizzarro and his colleagues show that Earth, Mars, and chondritic meteorites contain evidence for the presence of 60Fe (given by the 0.0 value of ε60Ni, the decay product of 60Fe) • In contrast, differentiated meteorites, which formed 1 My after initial solar system formation, have no evidence for 60Fe (low ε60Ni) www.psrd.hawaii.edu/July07/iron-60.html The Sun’s Crowded Delivery Room • In spite of having had no 60Fe, differentiated meteorites did contain 26Al, as did most early solar system materials • Martin Bizzarro and his colleagues suggest: – 26Al was incorporated into the interstellar cloud that gave birth to the Sun when massive stars spewed strong stellar winds – 60Fe was added a million years later when the star exploded Wolf-Rayet star -- Stellar winds blowing from a massive Wolf-Rayet star (brightest star near center) in NGC 2359 Nebula. Courtesy of P. Berlind & P. Challis, HarvardSmithsonian Center for Astrophysics. www.psrd.hawaii.edu/July07/iron-60.html