StarDate Online 27 Nov 2017, 06:00 UTC In the fall of 1967, Jocelyn Bell was looking for a “scruffy” source of radio waves in the constellation Vulpecula. Bell was working on her PhD at Cambridge University in England. She’d been using a new radio telescope to study quasars — brilliant objects billions of light-years away.
The Star Spot 27 Nov 2017, 02:00 UTC Feature Guest: Alan Stern There’s an intruder in our solar system. This fall we were invaded by the first interstellar space traveller, an elongated, cigar shaped alien asteroid. The mysterious object was ejected from its distant and unknown home, travelling for millions or billions of years before coming to pass between the Earth and the sun. On today’s episode of The Star Spot we’re joined by Dr. Alan Stern, principal investigator for the New Horizons mission to Pluto, to explain how the detection of an interstellar asteroid named Oumuamua is likely the first of many such strange and bizarre objects, and heralds the dawn of a new era in astronomy. Current in Space Proxima b may be the closer exoplanet, but Tony explains why it now has competition for closest Earth twin. And Maya reports how improved technology is helping us find galaxies that are dimmer, further and older than any before. About Our Guest Dr. Alan Stern is a planetary scientist with an illustrious career. He was principal investigator for eight planetary science missions and is the current PI for NASA’s New Horizons mission to Pluto. He was previously Executive Director of the Southwest Research Institute’s Space Science and ...
StarDate Online 25 Nov 2017, 06:00 UTC A pair of bright stars with an even brighter future is one of the highlights of the northern sky on late-autumn nights.
StarTalk Radio 24 Nov 2017, 17:35 UTC Delve into this mashup of Cosmic Queries as Neil deGrasse Tyson and an ensemble of comic co-hosts explore the vast wonder of the cosmos including double star systems, black holes, dark matter and antimatter, the Hubble constant, tidal friction, ET, and much more. NOTE: StarTalk All-Access subscribers can listen to this entire episode commercial-free: https://www.startalkradio.net/all-access/cosmic-queries-astrophysics-mashup/
SpaceTime with Stuart Gary
91: Recurring Martian Streaks could be just sand rather than water - SpaceTime with Stuart Gary Series 20 Episode 9124 Nov 2017, 08:10 UTC Stream episodes on demand from www.bitesz.com (mobile friendly) *Recurring Martian Streaks could be just sand rather than water A new study claims dark streaks often seen on the Sun facing slopes of Martian gullies and ravines could be caused by moving sand rather than melting sub-surface permafrost. The conclusions provide an alternative to previous speculation that the features – known as recurring slope lineae or RSLs – were caused by flowing meltwater from permafrost layers seeping out from the sides of gullies and ravines. *Could cosmic dust be transporting life between worlds? A new study suggests that life on Earth might have originated from biological particles brought to the planet in streams of cosmic dust particles. The findings would mean fast-moving flows of interplanetary dust that continually bombard Earth’s atmosphere could deliver tiny organisms from far-off worlds, or send Earth-based organisms to other planets, according to the research. *Listening for alien signals. Way back on August the 15tjh 1977 astronomers at Ohio State University’s Big Ear radio telescope supporting the SETI Search for ExtraTerrestrial Intelligence picked up a strange and very strong narrow band radio signal coming from the direction of the constellation Sagittarius. Now a new campaign is underway ...
NASACast Audio 22 Nov 2017, 14:00 UTC Our virtual tour of the solar system continues with Mercury, the closest planet to the Sun. Since it’s tough to observe Mercury except at dawn or twilight, most of what we know about Mercury is from NASA’s Mariner 10 and MESSENGER missions.