1. Space News Update - April 19, 2013 - In the News Story 1: Story 1: NASA's Kepler Discovers Its Smallest 'Habitable Zone' Planets to Date Story 2: Story 2: Early Galaxies Were Ahead of Their Time Story 3: Story 3: Ares Launch Attempt Set for Saturday Departments The Night Sky ISS Sighting Opportunities NASA-TV Highlights Space Calendar Food for Thought Space Image of the Week

2. NASA's Kepler Discovers Its Smallest 'Habitable Zone' Planets to Date

3. Early Galaxies Were Ahead of Their Time

4. Antares Launch Attempt Set for Saturday

5. The Night Sky Friday, April 19 · Look left of the Moon this evening for Regulus and the Sickle of Leo, as shown at right. Saturday, April 20 · The Moon now shines under Regulus after dark. Sunday, April 21 · The Lyrid meteor shower should peak before dawn Monday morning local time. Most years it's quite weak, but there have been surprises. See our article Lyrid Meteor Shower in 2013. Lyrid Meteor Shower in 2013 Monday, April 22 · The two brightest points in the sky after dusk this week are Jupiter in the west and Sirius in the southwest. Midway between them is Orion. This lineup is lying down lower every week now. How late into the spring can you keep it in view? Sky & Telescope

6. ISS Sighting Opportunities Sighting information for other cities can be found at NASA’s Satellite Sighting InformationSatellite Sighting Information For Denver: SATELLITELOCALDURATION MAX ELEV APPROACHDEPARTURE DATE/TIME(MIN)(DEG)(DEG-DIR) ISSFri Apr 19/09:27 PM22113 above NNW21 above NNE ISSSat Apr 20/08:36 PM41610 above NNW11 above NE ISSSat Apr 20/10:13 PM< 17219 above NW23 above NW ISSSun Apr 21/09:23 PM24121 above NNW40 above NE ISSMon Apr 22/08:31 PM52614 above NNW12 above E ISSMon Apr 22/10:08 PM13814 above WNW24 above W

7. NASA-TV Highlights April 20, Saturday 2 p.m. - 2013 Astronaut Hall of Fame Induction Ceremony - KSC (All Channels) 8 p.m. - Replay of 2013 Astronaut Hall of Fame Induction Ceremony - HQ (All Channels) April 21, Sunday 9 a.m. - Replay of 2013 Astronaut Hall of Fame Induction Ceremony - HQ (All Channels) 2 p.m. - Replay of 2013 Astronaut Hall of Fame Induction Ceremony - HQ (All Channels) 8 p.m. - Replay of 2013 Astronaut Hall of Fame Induction Ceremony - HQ (All Channels) April 22, Monday 11:05 a.m. - ISS Expedition 35 In-Flight Event for the Canadian Space Agency with the Canadian National Film Board Space School - JSC (All Channels) Watch NASA TV online by going to the NASA websiteNASA website

8. Space Calendar JPL Space Calendar Apr 19 - Mercury Passes 2.0 Degrees From UranusMercuryUranus Apr 19 - Comet C/2006 S3 (LONEOS) Closest Approach To Earth (4.839 AU)Comet C/2006 S3 (LONEOS)Closest Approach To Earth Apr 19 - Asteroid 2013 GH23 Near-Earth Flyby (0.014 AU)Asteroid 2013 GH23 Apr 19 - Asteroid 1850 Kohoutek Closest Approach To Earth (1.066 AU)Asteroid 1850 Kohoutek Apr 19 - Asteroid 30444 Shemp Closest Approach To Earth (2.107 AU)Asteroid 30444 Shemp Apr 19 - [Apr 17] Workshop: Opportunities to Use Remote Sensing in Understanding Permafrost and Ecosystem, Washington DCWorkshop: Opportunities to Use Remote Sensing in Understanding Permafrost and Ecosystem Apr 19-20 - 7th Gulf Coast Gravity Meeting, Oxford, Mississippi7th Gulf Coast Gravity Meeting Apr 20 - [Apr 19] Cygnus Mass Simulator/ Dove 1/ Phonesat v1A, v1B & 7v1C Antares Launch (Inagural Antares Launch, Test Flight to International Space Station)Cygnus Mass SimulatorDove 1PhonesatAntares Launch Apr 20 - [Apr 13] Astronomy DayAstronomy Day Apr 20 - Comet P/2011 C2 (Gibbs) Closest Approach To Earth (4.672 AU)Comet P/2011 C2 (Gibbs)Closest Approach To Earth Apr 20 - Comet P/2012 T2 (PANSTARRS) Perihelion (4.817 AU)Comet P/2012 T2 (PANSTARRS)Perihelion Apr 20 - Asteroid 1 Ceres Occults TYC 1890-00359-1 (7.8 Magnitude Star)Asteroid 1 Ceres Occults TYC 1890-00359-1 Apr 20 - Asteroid 10637 Heimlich Closest Approach To Earth (2.152 AU)Asteroid 10637 Heimlich Apr 20-21 - International Space Apps ChallengeInternational Space Apps Challenge Apr 21 - [Apr 17] Progress 49 Reenters Earth's AtmosphereProgress 49 Reenters Earth's Atmosphere Apr 21 - [Apr 17] Asteroid 2013 GT79 Near-Earth Flyby (0.033 AU)Asteroid 2013 GT79 Apr 21 - [Apr 14] Asteroid 2013 GU66 Near-Earth Flyby (0.061 AU)Asteroid 2013 GU66 Apr 21 - Asteroid 3672 Stevedberg Closest Approach To Earth (1.472 AU)Asteroid 3672 Stevedberg Apr 21 - Asteroid 79896 Billhaley Closest Approach To Earth (1.543 AU)Asteroid 79896 Billhaley Apr 22 - [Apr 15] Earth DayEarth Day Apr 22 - Lyrids Meteor Shower PeakLyrids Meteor Shower Apr 22 - [Apr 17] Comet P/2013 G4 (PANSTARRS) Closest Approach To Earth (1.718 AU)Comet P/2013 G4 (PANSTARRS)Closest Approach To Earth Apr 22 - [Apr 14] Comet 136P/Mueller At Opposition (4.158 AU)Comet 136P/MuellerAt Opposition Apr 22 - Asteroid 2009 SQ104 Near-Earth Flyby (0.071 AU)Asteroid 2009 SQ104Near-Earth Flyby Apr 22 - Asteroid 2010 CE55 Near-Earth Flyby (0.083 AU)Asteroid 2010 CE55Near-Earth Flyby Apr 22 - Asteroid 2012 XF55 Near-Earth Flyby (0.084 AU)Asteroid 2012 XF55Near-Earth Flyby Apr 22 - Asteroid 65803 Didymos Closest Approach To Earth (1.272 AU)Asteroid 65803 DidymosClosest Approach To Earth

9. Food for Thought NASA Announces Challenges for the 2013 International Space Apps Challenge

10. Space Image of the Week Airglow, Gegenschein, and Milky Way