Unraveling Circumstellar Disks and Early Planetary Growth
نویسنده
چکیده
The solar system formed 4.5–4.6 billion years ago (Patterson 1956) by collapse of a portion of a molecular cloud of gas and dust rather like the Eagle or Orion nebulae. Some of the star dust from the solar nebula has now been isolated from primitive meteorites. The isotopic compositions of many elements in these grains are vastly different from those of our solar system and provide fingerprints of the stars that preceded our Sun (Nittler 2003). These include red giants, supernovae and novae.
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