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https://www.centauri-dreams.org/?p=39837: More News from ‘The Planet of Doubt’
Centauri Dreams

Direct link More News from ‘The Planet of Doubt’

25 Apr 2018, 13:18 UTC The detection of hydrogen sulfide just above the upper cloud deck of Uranus has received the nods you might expect to rotten eggs, H2S having the odor of such unappetizing objects. But this corrosive, flammable gas is quite an interesting find even if it makes a whiff of Uranian air more off-putting than it already was. Not that you’d live long enough to notice the scent if you happened to be there, as Patrick Irwin (University of Oxford, UK) is quick to note: “If an unfortunate human were ever to descend through Uranus’s clouds, they would be met with very unpleasant and odiferous conditions. Suffocation and exposure in the negative 200 degrees Celsius atmosphere made of mostly hydrogen, helium, and methane would take its toll long before the smell.”
https://www.npr.org/sections/thetwo-way/2018/04/25/605622779/you-are-here-scientists-unveil-precise-map-of-more-than-a-billion-stars?utm_medium=RSS&utm_campaign=space: You Are Here: Scientists Unveil Precise Map Of More Than A Billion Stars
NPR

Direct link You Are Here: Scientists Unveil Precise Map Of More Than A Billion Stars

25 Apr 2018, 13:03 UTC Wednesday was the day astronomers said goodbye to the old Milky Way they had known and loved and hello to a new view of our home galaxy.A European Space Agency mission called Gaia just released a long-awaited treasure trove of data: precise measurements of 1.7 billion stars.
http://feeds.space.com/~r/spaceheadlines/~3/UN6JJdqayaM/40395-jupiter-great-red-spot-juno-photo.html: Jupiter's Great Red Spot Swirls in Stunning Up-Close Photo by Juno Probe
SPACE.com

Direct link Jupiter's Great Red Spot Swirls in Stunning Up-Close Photo by Juno Probe

25 Apr 2018, 11:05 UTC A new photo by NASA's Juno spacecraft captures Jupiter's famous Great Red Spot in all its angry, swirling glory.
https://astronomynow.com/?p=25285: Large galaxies may host multiple supermassive black holes
Astronomy Now

Direct link Large galaxies may host multiple supermassive black holes

24 Apr 2018, 19:50 UTC Supermassive black holes, SMBHs, are thought to lurk at the hearts of many, if not all, large galaxies, including Earth’s Milky Way. But when galaxies merge, the smaller galaxy may leave its own SMBH in a wide orbit within the new host.
https://blogs.nasa.gov/spacestation/?p=5897: Astronauts Switch Roles Today from Scientists to Plumbers
NASA Space Station Blog

Direct link Astronauts Switch Roles Today from Scientists to Plumbers

24 Apr 2018, 17:23 UTC The six Expedition 55 crew members are not only space scientists but also space plumbers who periodically work on the International Space Station’s toilet. Aside from today’s science and bathroom work, the crew also installed computer networking gear and inspected spacewalk equipment.
https://www.centauri-dreams.org/?p=39830: NEOWISE: New Data Release, Implications
Centauri Dreams

Direct link NEOWISE: New Data Release, Implications

24 Apr 2018, 12:54 UTC The Wide-field Infrared Survey Explorer (WISE) has been featured often in these pages, usually in terms of brown dwarfs and the possibility of uncovering a small star or brown dwarf closer than Proxima Centauri. But while we still have no evidence of such, we do have abundant data on brown dwarfs, as well as a useful compendium of objects that come close to the Earth. For WISE, launched in 2009 and placed into hibernation in 2011 upon completion of its primary mission, was reactivated in 2013 as NEOWISE. The goal is now the observation of asteroids and comets both near and far by way of characterizing their size and composition.
69C18ED6-6216-4C14-9D7F5DF7851F4D54: Stellar Effort: Chart of Milky Way Includes More Than One Billion Stars
Scientific American

Direct link Stellar Effort: Chart of Milky Way Includes More Than One Billion Stars

24 Apr 2018, 10:45 UTC In an eagerly anticipated development, astronomers have created the largest and most precise 3-D map of the Milky Way galaxy. The European Space Agency’s $1-billion Gaia mission released its newest data set in April, detailing the positions and motions of more than a billion stars.
http://23.1656: Reusing old canvases
Cosmic Diary

Direct link Reusing old canvases

23 Apr 2018, 23:31 UTC The wind on Mars is an artist, or at least it tries really hard to be one. It flutters up and down mountains, winding along valleys, dragging its wings in the sand and building up really amazing structures that could win any sand sculpture award.
www.planetary.org-869857931: Moon Monday: Prometheus
The Planetary Society Blog

Direct link Moon Monday: Prometheus

23 Apr 2018, 17:52 UTC Happy Monday! Here's a picture of Prometheus. You may think it's a picture of Saturn. Look hard, toward the bottom, and you'll see Prometheus, doing its part to keep the F ring in line.
http://www.skyandtelescope.com/?p=255478597: Pluto’s Moon Charon Receives Formal Names
Sky and Telescope

Direct link Pluto’s Moon Charon Receives Formal Names

23 Apr 2018, 15:47 UTC What's in a name? On July 14, 2015, NASA's New Horizons spacecraft completed a whirlwind flyby of Pluto and its moons, revealing these distant worlds in dramatic detail.

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