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


Dwarf planet Makemake lacks atmosphere
Posted: Fri, Nov 23, 2012, 1:45 PM ET (1845 GMT)
Makemake illustration Nov 2012 (ESO) Astronomers observing a stellar occultation by the dwarf planet Makemake found no evidence of an atmosphere around the distant, icy world. Astronomers observed the occultation using three telescopes at the European Southern Observatory (ESO) in Chile in April 2011 as the dwarf planet, about two-thirds the size of Pluto, passed in front of a distant star. The star abruptly disappeared and then reappeared, a telltale sign that there is no atmosphere around the dwarf planet. Astronomers speculate that the dwarf planet is not massive enough to hold on to an atmosphere. The observations did allow astronomers to refine the density and size of Makemake, including the fact that the world is an oblate spheroid, with axes of 1430 and 1502 kilometers.
<<previous article   next article>>
news in brief
Blue Origin conducts New Shepard test flight
Posted: Tue, Jun 21 9:40 AM ET (1340 GMT)

Ariane 5 launches communications satellites
Posted: Tue, Jun 21 9:38 AM ET (1338 GMT)

Soyuz returns three ISS crew to Earth
Posted: Tue, Jun 21 9:36 AM ET (1336 GMT)

news links
Thursday, June 30
Ithaca High CubeSat team's concept to get a shot at space
Cornell Univ. — 6:22 am ET (1022 GMT)
Getting hooked on space
Jerusalem Post — 6:16 am ET (1016 GMT)


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