spacetoday.net: space news from around the webin association with SpaceNews


White dwarfs confirm age of universe
Posted: Thu, Apr 25, 2002, 6:42 AM ET (1042 GMT)
White dwarf stars in M4 (STScI) A new study of white dwarf stars in a nearby cluster has provided an independent confirmation of the age of the universe. Astronomers used the Hubble Space Telescope to observe faint white dwarfs in the cluster M4, about 7,000 light-years away. Astronomers measured the cooling rates of these stars and found that the oldest are about 13 billion years old, putting a strong lower limit on the age of the universe. Since globular clusters like M4 are believed to have formed within a billion years of the Big Bang, the results imply that the universe itself is 13-14 billion years old. These results confirm separate efforts to measure the age of the universe by observing distant galaxies to measure the universe's expansion rate: those studies also found the universe to be 13-14 billion years old.
<<previous article   next article>>
news in brief
Final Delta 2 launches ICESat-2
Posted: Sun, Sep 16 10:41 AM ET (1441 GMT)

Japanese ISS cargo mission launch scrubbed
Posted: Sun, Sep 16 10:40 AM ET (1440 GMT)

SpaceX to announce new plans for circumlunar trip
Posted: Sun, Sep 16 10:39 AM ET (1439 GMT)

news links
Friday, September 21
Air Force padded its $13 billion Space Force estimate, analyst says
Washington Examiner — 5:51 am ET (0951 GMT)
Kleos Space seals launch deal for 'scouting mission' satellites
Luxembourg Times — 5:49 am ET (0949 GMT)


about spacetoday.net   ·   info@spacetoday.net   ·   mailing list