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


Space weathering changes color of asteroids
Posted: Mon, May 24, 2004, 8:35 AM ET (1235 GMT)
Planetary scientists have published new evidence for a phenomenon called "space weathering" that causes the surfaces of asteroids to change color. A puzzle of asteroid research for decades has been why many asteroids have a reddish color while a class of meteorites, ordinary chondrites, have a bluish color. In a paper published in the current issue of the journal Nature, scientists measured the colors of 100,000 asteroids between six million and three billion years old and found that older asteroids were redder than younger ones, suggesting that some mechanism is changing the color of the asteroids. Scientists hypothesis that exposure to solar and/or cosmic radiation is changing the composition of the surface layers of the asteroids, creating the reddish appearance.
<<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
Sunday, September 23
Can tourism propel space exploration to new heights?
Christian Science Monitor — 8:41 am ET (1241 GMT)
Japan space robots start asteroid survey
AFP — 8:35 am ET (1235 GMT)
Kounotori 7 cargo resupply mission on its way to ISS
SpaceFlight Insider — 8:35 am ET (1235 GMT)


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