Rip van twinkle: the oldest stars have been growing younger
Article Abstract:
Astronomers now believe that the oldest stars are about 13 billion years old, based on observations from the Hipparcos satellite and new information about star evolution. Measurement of the amount of hydrogen that fuels a star gives an idea as to the lifetime of the star, but the actual age of the stars is determined by comparing them with stars born at about the same time.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 2001
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The oldest old
Article Abstract:
Many nonagenarians report that they lead active lives with few health problems, which calls into question commonly accepted notions about the aging process. Geriatric researchers theorize that these remarkably healthy 90-year-olds may have an evolutionary advantage over the general population.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 1995
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A sharper view of the stars
Article Abstract:
New optical interferometers present stars in 100 times finer detail than the Hubble Space Telescope.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 2001
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