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tag:blogger.com,1999:blog-1014682403395027648.post-6968490144718254699: A Low-Density Transiting Super-Neptune
Beyond Earthly Skies

Direct link A Low-Density Transiting Super-Neptune

3 Jul 2015, 23:00 UTC <div class="separator" style="clear: both; text-align: center;"><a href="http://4.bp.blogspot.com/-6eaFYWO041E/VXAhOWiOaUI/AAAAAAAAHhk/KAvTW3nvrlQ/s1600/Post%2B-%2BJuly%2B2015%2B%25284%2529%2B-%2B1.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="640" src="http://4.bp.blogspot.com/-6eaFYWO041E/VXAhOWiOaUI/AAAAAAAAHhk/KAvTW3nvrlQ/s640/Post%2B-%2BJuly%2B2015%2B%25284%2529%2B-%2B1.jpg" width="558" /></a></div><div style="text-align: center;"><span style="font-family: inherit;"><br /></span></div><span style="font-family: inherit;">Bayliss et al. (2015) present the discovery of a low-density transiting super-Neptune identified as HATS-8b. This planet is in a close-in 3.58-day orbit around a Sun-like star. Photometric and spectroscopic observations indicate that HATS-8b has 0.873 times the radius and 0.138 times the mass of Jupiter, resulting in a remarkably low bulk density of only 0.259 g/cm³. HATS-8b is termed a super-Neptune as its mass is roughly halfway between that of Neptune and Saturn. Due to its large radius and low density, the gravity on HATS-8b is less than half the surface gravity on Earth and its atmospheric scale height (i.e. increase in altitude over which the atmospheric pressure decreases by a factor of 2.718) is expected to be almost 1,000 km.</span><br /><span style="font-family: inherit;"><br /></span><span style="font-family: inherit;">HATS-8b is similar in mass as Kepler-101b, which is slightly more massive at 0.16 times the mass of Jupiter. However, the size of Kepler-101b is only 0.515 times the radius of Jupiter, giving it a much higher bulk density of 1.45 g/cm³, a factor of 5.6 times the bulk density of ...
tag:blogger.com,1999:blog-8943666447669921355.post-8792295034498955268: Third Annual FIREFLY and COSMOS T-Shirt Giveaway
Pillow Astronaut

Direct link Third Annual FIREFLY and COSMOS T-Shirt Giveaway

3 Jul 2015, 17:00 UTC <div><a href="http://www.addthis.com/bookmark.php"><img alt="Share" border="0" height="16" src="http://s7.addthis.com/static/btn/lg-share-en.gif" width="125" /></a></div><br />Browncoats! Spacetweeps! Science nerds!<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.rafflecopter.com/rafl/display/cf6012653/" target="_blank"><img alt="http://www.rafflecopter.com/rafl/display/cf6012653/" border="0" height="248" src="http://3.bp.blogspot.com/-AnxCbg2Dr7I/VZa2LNbKZZI/AAAAAAAAWkY/U5P3X6cMEYk/s400/toomuchhair.jpg" width="400" /><span id="goog_1008262310"></span></a><span id="goog_1008262311"></span></div><br />It is that time of year again. In celebration of Shepherd Book's milestone birthday this week, I'm once again partnering for tweetstorms with <b><a href="http://www.geekchictees.com/" target="_blank">GeekChicTees</a></b> for a Firefly T-shirt giveaway!<br /><br />The contest will run for one week, today through next Friday (July 3rd - 10th). On July 10th, our supremely indifferent cat will pick one two lucky winners, and Ron Glass will officially be a septuagenarian!&nbsp; Like, wow.<br /><br />As always, very special thanks to <b><a href="https://www.facebook.com/pages/Captain-Mals-Wisdom/307922999246389#" target="_blank" title="Captain Mal's Wisdom">Captain Mal's Wisdom</a></b>, who always helps us get the word out to space cadets of all stripes. (Though we're pretty sure they do it for the cool free T-shirts, too.) <br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.rafflecopter.com/rafl/display/cf6012653/" target="_blank"><img alt="http://www.rafflecopter.com/rafl/display/cf6012653/" border="0" height="400" src="http://3.bp.blogspot.com/-7z68fNZrqOI/VZa8lvVBE2I/AAAAAAAAWko/CHpaINlOKkI/s400/giveaway.jpg" width="400" /></a></div><div align="center" style="color: #66cccc; font-weight: bold;">Click to enter T-shirt Giveaway!</div><br />To enter the contest for either free T-shirt, pop over to our <b><a class="rafl" href="http://www.rafflecopter.com/rafl/display/cf6012653/" id="rc-cf60121" rel="nofollow" target="_blank">Official Giveaway Page</a> </b>and choose ways to enter on Twitter and Facebook.<br /><br />Winners, upon sending clothing ...

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