StarDate Online 3 Dec 2017, 06:00 UTC The Sun isn’t a very good clock. The time it takes to move from one “noon” to the next can vary by as much as half a minute per day. That doesn’t have much impact on our daily lives. But it does create some interesting effects. One example is that the year’s earliest sunset comes several days before the shortest day of the year.
NASACast 1 Dec 2017, 18:21 UTC The Geminds peak on the morning of the 14th, and are active from December 4th through the 17th. The peak lasts for a full 24 hours , meaning more worldwide meteor watchers will get to see this spectacle. If you can see Orion and Gemini in the sky you'll see some Geminids. Expect to see up to 120 meteors per hour between midnight and 4 a.m. but only from a dark sky. You'll see fewer after moonrise at 3:30 a.m. local time.
StarDate Online 30 Nov 2017, 06:00 UTC Pulsars are some of the most accurate clocks in the entire universe. Except, apparently, when they’re not.
StarTalk Radio 30 Nov 2017, 04:01 UTC Neil deGrasse Tyson welcomes Andy Weir, best-selling author of “The Martian,” to talk about his new book, “Artemis” – a heist/crime novel that happens to be set on the Moon. Neil and Andy explore the unique, science-infused creative process that went into the novel, and much more. Special thanks to Audible for making this bonus episode possible. NOTE: StarTalk All-Access subscribers can listen to episodes commercial-free. Find out more at https://www.startalkradio.net/startalk-all-access/
Gravity Assist 29 Nov 2017, 14:00 UTC The next stop on our virtual tour is Venus, the closest planet to Earth and the hottest planet in our solar system, with surface temperatures scorching enough to melt lead. NASA’s Jim Green is joined by David Grinspoon of the Planetary Science Institute to discuss Venus’ volcanoes, clouds of sulfuric acid, and runaway greenhouse effect. Was Venus once was like Earth in its distant past and what clues might it provide about the future of our own planet? You’ll also hear about Venus’ backward rotation and “forever sunsets,” plus the remarkable and heroic “Apollo 11”-like story of the Akatsuki spacecraft.
StarDate Online 29 Nov 2017, 06:00 UTC Scientists made big news last year when they announced the first detection of gravitational waves — ripples in space and time caused by the motions of massive objects. Even before the first discovery though, scientists had good evidence for the existence of the waves: measurements of the mutual orbit of two dead stars.