1. Space News Update - May 21, 2019 - In the News Departments Story 1:
Giant Impact Caused Difference Between Moon's Hemispheres
Story 2:
NASA, ULA Find Launch Opportunity for Inflatable Heat Shield Demonstrator
Story 3:
NASA's Juno Finds Changes in Jupiter's Magnetic Field
Departments
The Night Sky
ISS Sighting Opportunities
NASA-TV Highlights
Space Calendar
Food for Thought
Space Image of the Week

2. Giant Impact Caused Difference Between Moon's Hemispheres
In this computer graphic, NASA's Voyager 1 probe, moving toward upper left, nears the edge of the sun's influence, flying through a region of space dominated by a "magnetic highway" that helps mediate the flow of particles into and out of the solar system. The region includes particles from the sun's southern hemisphere that have been forced northward by the pressure of the interstellar wind. Voyager 1 is expected to cross the boundary into interstellar space sometime within the next few years if not sooner. (Credit: NASA)

3. NASA, ULA Find Launch Opportunity for Inflatable Heat Shield Demonstrator

4. NASA's Juno Finds Changes in Jupiter's Magnetic Field

5. The Night Sky
Tuesday, May 21
• This is the time of year when Leo the Lion starts walking downward toward the west, on his way to departing into the sunset in early summer. Right after dark, spot the brightest star fairly high in the west-southwest. That's Regulus, his forefoot.
Wednesday, May 22
• Vega is well up in the east-northeast after dark. Look for its faint little constellation Lyra, the Lyre, dangling down from it with its bottom canted to the right.
Thursday, May 23
• A gigantic asterism you may not know is the Diamond of Virgo, some 50° tall and extending over five constellations. It currently stands upright in the south after the stars come out. Start with Spica, its bottom. Upper left from Spica is bright Arcturus. Almost as far upper right from Arcturus (as you face south) is fainter Cor Caroli, 3rd magnitude, almost overhead. The same distance lower right from there is Denebola, the 2nd-magnitude tail-tip of Leo. And then back to Spica.
The bottom three of these stars, the brightest, form a nearly perfect equilateral triangle. Maybe we should call this the "Spring Triangle" to parallel those of summer and winter?
Sky & Telescope
Friday, May 24
• Meanwhile the Summer Triangle is making its appearance in the east, one star after another. The first in view as night descends is Vega, the brightest star in the east-northeast. Lower left it (by two or three fists at arm's length) is Deneb. Farther to Vega's lower right is Altair, rising above the horizon not long after dark.
Saturday, May 25

6. ISS Sighting Opportunities
ISS For Denver:
Date
Visible
Max Height
Appears
Disappears
Tue May 21, 9:43 PM
2 min
22°
22° above NNW
11° above NNE
Tue May 21, 11:21 PM
< 1 min
10°
10° above N
10° above NNE
Wed May 22, 8:51 PM
3 min
33°
33° above NNW
10° above NE
Wed May 22, 10:29 PM
11°
11° above N
Thu May 23, 00:07 AM
1 min
12°
12° above NNE
Thu May 23, 9:39 PM
14°
14° above N
Thu May 23, 11:16 PM
Fri May 24, 00:51 AM
15°
11° above NNW
15° above NNW
Fri May 24, 8:49 PM
18°
18° above NNW
Fri May 24, 10:26 PM
Sat May 25, 00:03 AM
17°
15° above N
17° above NNE
No Sightings in Denver through Friday Apr 26th
Sighting information for other cities can be found at NASA’s Satellite Sighting Information

7. NASA-TV Highlights (all times Eastern Time Zone)
MAVEN Launch November 18, 2013
NASA
NASA-TV Highlights
(all times Eastern Time Zone)
May 21, Tuesday
1 p.m. - What’s New in Aerospace? – Pit Stops and Space Toilets: A Conversation with NASA astronaut Drew Feustel (All Channels)
May 22, Wednesday
12:20 p.m. - International Space Station In-Flight Educational Event with the Milby High School in Houston, Texas, and NASA astronaut Nick Hague (All Channels)
3 p.m. – NASA Science Live: Storms Across the Solar System (All Channels)
May 23, Thursday
1 p.m. - Administrator Jim Bridenstine speaks at the Florida Institute of Technology (All Channels)
Watch NASA TV online by going to the NASA website

8. Space Calendar JPL Space Calendar
May 21 - Apollo Asteroid Lugh Closest Approach To Earth (1.388 AU)
May 21 - Asteroid 9618 Johncleese Closest Approach To Earth (1.451 AU)
May 21 - Seminar: Primordial Black Holes' Dark Dresses - Roads Towards a Discovery and Possible Implications, Barcelona, Spain
May Space Tech Expo, Pasadena, California
May Space Forum Conference, Luxembourg
May NOAA ESRL Global Monitoring Annual Conference 2019, Boulder, Colorado
May Australasia Satellite Forum 2019, Sydney, Australia
May European Lunar Symposium, Manchester, United Kingdom
May NASA Biological Diversity and Ecological Forecasting Annual Team Meeting, Arlington, Virginia
May th International Conference Space Technologies: Present and Future, Dnepr, Ukraine
May 22 - RISAT-2B PSLV-XL Launch
May 22 - Moon Occults Saturn
May 22 - Comet 322P/SOHO At Opposition (1.128 AU)
May 22 - Comet C/2019 H1 (NEOWISE) Closest Approach To Earth (1.217 AU)
May 22 - Comet P/2019 A8 (PANSTARRS) At Opposition (1.679 AU)
May 22 - Event: Women in Leadership, San Diego, California
May 22 - Committee Teleconference: Committee on Astrobiology and Planetary Sciences
May th International Conference on Earth Science, Climate Change & Space Technology, Rome, Italy
May International Association of Geodesy (IAG) Reference Frame Sub-Commission for Europe (EUREF) 2019 Symposium, Tallinn, Estonia
May Joint Urban Remote Sensing Event, Vannes, France
May th China Satellite Navigation Conference (CSNC), Beijing, China
May 23 - Moon Occults Dwarf Planet Pluto
May 23 - Seminar: Hayabusa2 at Ryugu, Houston, Texas
May 23 - Seminar: 3D Imaging of the Emission from the Inner Ejecta of SN1987A, Barcelona, Spain
May 24 - Apollo Asteroid 2019 JF7 Near-Earth Flyby (0.038 AU)
May 24 - Asteroid 2956 Yeomans Closest Approach To Earth (1.503 AU)
JPL Space Calendar

9. Food for Thought
Protected Wilderness. One-Eighth Left for Mining and Resource Exploitation

10. Space Image of the Week Deep Field: Nebulae of Sagittarius
Image Credit & Copyright: Emilio Rivero Padilla