StarDate Online 19 Mar 2018, 05:00 UTC The Sun will cross a special point in the sky tomorrow. The crossing marks the beginning of spring in the northern hemisphere — the vernal equinox. It also marks the starting point for measuring the length of the year. And for much of human history, it also marked the start of the year — the equinox was New Year’s Day. The equinox probably gained its significance because spring is a time of birth and renewal. The days are getting longer, flowers are beginning to bloom, and other signs of life are popping up. So it made sense that the calendar year would begin then, too. In fact, Britain and its American colonies didn’t switch the start of the year to January 1st until 1752.
SpaceTime with Stuart Gary
21: New studies suggest the Moon has loads of water - SpaceTime with Stuart Gary Series 21 Episode 2119 Mar 2018, 04:02 UTC A new analysis of data from two lunar missions finds evidence that the Moon's water is widely distributed across the surface and not confined to a particular region or type of terrain. The findings indicate that lunar water appears to be present, though it's not necessarily easily accessible.
The Star Spot 19 Mar 2018, 01:00 UTC Last month astronomers announced the first ever discovery of extrasolar planets… in another galaxy! We’ve already confirmed almost 4000 planets beyond our solar system, but these have all been in a single galaxy, the Milky Way. But then last month a serendipitous discovery opened the door to a galaxy 3.8 billion light years away and it turns out it’s home to thousands upon thousands of planets. Today we're joined here at The Star Spot by co-discoverer Xinyu Dai to describe the unplanned discovery and whether this is the beginning of a new era in extrasolar extragalactic planetary astronomy.
StarDate Online 18 Mar 2018, 05:00 UTC The vanishingly thin crescent Moon has a couple of companions after sunset this evening — the planets Venus and Mercury. Venus is the brilliant “evening star,” to the right of the Moon. Much-fainter Mercury is about the same distance to the upper right of Venus. Mercury is tough to see in the early twilight, but its proximity to the brighter lights can help you pick it out.
StarDate Online 17 Mar 2018, 05:00 UTC An owl stares at us from the Big Dipper — the death mask of a star. It consists of several concentric “bubbles” of gas blown into space by the dying star. It’s nice and round, and seen through a large telescope or in photographs, it has two dark patches that look like the eyes of an owl.
Houston, We Have a Podcast 16 Mar 2018, 12:30 UTC Ricky Arnold, NASA Astronaut, talks about his time as an educator, his first flight on the Space Shuttle, and his plans to teach from space during his first long-duration flight on the International Space Station starting on March 21, 2018. HWHAP Episode 36.
SpaceTime with Stuart Gary
20: Astronomers detect ancient signals from the first stars in universe - SpaceTime with Stuart Gary S21E2016 Mar 2018, 06:27 UTC Astronomers have for the first time ever detected an ancient signal from the first stars in the universe. The discovery places the first stars at just 180 million years after the big bang – far earlier than previously thought.
StarDate Online 15 Mar 2018, 05:00 UTC Scientists pretty much agree that our universe — everything that we can see and touch — evolved from a single moment of creation, known as the Big Bang. It happened 13.8 billion years ago, and it created not just matter and energy, but space and time as well. But there’s absolutely no agreement about what came before the Big Bang. Some say that there was nothing at all. It’s an idea supported by Stephen Hawking, who has said that the universe wasn’t created, it just is.
StarTalk Radio 14 Mar 2018, 19:10 UTC Join Neil deGrasse Tyson as he sits down with world-renowned physicist Stephen Hawking. We offer this episode in memory of Dr. Hawking's passing, and in celebration of his life. With co-host Matt Kirshen, astrophysicist Janna Levin, theoretical physicist Michio Kaku, and Bill Nye the Science Guy.