February 3, 2020 - To See the Unseen
To See the Unseen Twelve million light-years away in the constellation Ursa Major, galaxy M81 was one of the first objects studied by the Spitzer Space Telescope, NASA’s fourth Great Observatory. Launched in 2003 and slated for retirement this year, Spitzer is a sibling of the Hubble Space Telescope, the Compton Gamma Ray Observatory, and the Chandra X-Ray Observatory. Spitzer has unprecedented resolution at invisible infrared wavelengths, revealing detail hidden from view in traditional visible light images. This Spitzer image shows several key components of this “nearby” galaxy: old stars (clustered in the white central bulge of the galaxy), interstellar dust (the main constituent of the spiral arms), and regions of new star formation (the bright, clumpy areas along the leading edge of the spiral arms).
Image credit: Credit: NASA / JPL / Caltech / Harvard-Smithsonian Center for Astrophysics
Weekly Calendar
February 3 - 9, 2020
Holidays - Sky Events - Space History
Monday 3
1966: Luna 9 lands on Moon
1984: STS-41B Challenger launched
1994: STS-60 Discovery launched
1995: STS-63 Discovery launched; Eileen Collins first woman shuttle pilot
2006: Astronauts aboard the ISS launch SuitSat satellite
Tuesday 4
1906: Clyde Tombaugh born
Wednesday 5
1965: First test of Apollo Service Propulsion System engine
1967: Lunar Orbiter III launched
1971: Apollo 14 lands on Moon
1974: Mariner 10 uses gravity of Venus to adjust trajectory toward Mercury
Thursday 6
1971: Alan Shepard hits first golf balls on Moon
2018: First Falcon Heavy launch
Friday 7
1984: Bruce McCandless makes first untethered spacewalk during STS-41B
1999: Stardust comet probe launched
2001: STS-98 Atlantis launched
2008: STS-122 Atlantis launched
Saturday 8
1828: Jules Verne born
1974: 84-day Skylab 4 mission ends, last crew to occupy Skylab
2010: STS-130 Endeavour launched
Sunday 9
Full Moon 2:33 AM ET
1971: Apollo 14 returns from Moon; last post-mission quarantine