November 6, 2017 - New Star Shatters the Sphere
New Star Shatters the Sphere Danish astronomer Tycho Brahe observed a new, brilliant star in the constellation Cassiopeia 445 years ago this week. His measurements, which showed it to be a distant star and not a local phenomenon, were disturbing because the “sphere” of stars that surrounded Earth was considered to be divine, perfect, and immutable. We know today that Tycho’s “new star” was a supernova, a dying star that ejected its matter into space in a violent explosion. Over four centuries later, the Chandra X-Ray Observatory’s image of the supernova remnant shows an expanding bubble of multimillion-degree debris (green and red) inside a more rapidly moving shell of extremely high-energy electrons (filamentary blue). The stellar debris is expanding at 10 million km (6 million mi) per hour.
Image credit: NASA / CXC / GSFC / B.Williams et al
Weekly Calendar
November 6-12, 2017
Holidays - Sky Events - Space History
Monday 6
1572: Tycho Brahe records bright new star (supernova SN 1572) in Cassiopeia
1966: Lunar Orbiter II launched
Tuesday 7
Election Day
1963: First flight test of Apollo Launch Escape System
1967: Surveyor 6 launched
1996: Mars Global Surveyor launched
2013: Soyuz TMA-11M launched carrying ISS Expedition 38/39 crew
Wednesday 8
1656: Edmund Halley born
1984: STS-51A Discovery launched
1995: STS-74 Atlantis launched
2005: ESA’s Venus Express launched
Thursday 9
1934: Carl Sagan born
1967: Surveyor 6 lands on Moon
1967: Apollo 4 launched, first Saturn V launch
Friday 10
Last Qtr Moon 3:37 PM ET
1970: Luna 17 launched
Saturday 11
Remembrance Day (Canada)
Veteran’s Day
Regulus 0.4° south of Moon
1875: Vesto Slipher born
1966: Gemini XII launched
1982: STS-5 Columbia launched
Sunday 12
Mercury 2° north of Antares
1833: Great Leonid Meteor Shower
1980: Voyager 1 flies past Saturn
1981: STS-2 Columbia launched
2014: Philae probe becomes first spacecraft to land on a comet