November 2, 2015 - Covering the Galaxy Beat
Covering the Galaxy Beat Until the early twentieth century, the size and shape of our galaxy remained somewhat a mystery, but it was solved, in part, by American astronomer Harlow Shapley, born 130 years ago this week. Shapley, who was a cub reporter and a journalism student before pursuing a career in astronomy, knew that Cepheid variable stars had a distinct pattern and range to their changes in brightness. Shapley identified Cepheids in the globular clusters that encircle our galaxy, and was able to calculate the distance to almost 100 of these clusters (including M53, shown here), thus giving him a three-dimensional map of the outer reaches of the Milky Way. His studies revealed our galaxy was much larger than previously thought, and that our Sun is not located at the center of the Milky Way.
Image credit: ESA / Hubble and NASA
Weekly Calendar
November 2-8, 2015
Holidays - Sky Events - Space History
Monday 2
1885: Harlow Shapley born
1917: First light for Mount Wilson Observatory 100-inch Hooker telescope
Tuesday 3
Election Day
Last Qtr Moon 7:24 AM ET
Venus 0.7° south of Mars
Taurid meteor shower
1957: Sputnik 2 carries dog Laika, first living creature to orbit Earth
1966: Test flight of Manned Orbital Laboratory components
1973: Mariner 10 launched
1994: STS-66 Atlantis launched
Wednesday 4
Taurid meteor shower
Thursday 5
2013: Mars Orbiter Mission launched, India's first interplanetary mission
Friday 6
Jupiter 2° north of Moon
1572: Tycho Brahe records bright new star (supernova SN 1572) in Cassiopeia
1966: Lunar Orbiter II launched
Saturday 7
Mars 1.8° north of Moon
Venus 1.2° north of Moon
Moon at apogee
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
Sunday 8
1656: Edmund Halley born
1984: STS-51A Discovery launched
1995: STS-74 Atlantis launched
2005: ESA’s Venus Express launched