Neil deGrasse Tyson on Cosmic Queries, Science, Carl Sagan, and More…
An original interview with Neil deGrasse Tyson, talking about science, alien intelligence, living in a hologram, and more…
This week, we are delighted to welcome Neil deGrasse Tyson to the show. We will talk about his new book, Cosmic Queries, as well as the nature of intelligence, Carl Sagan, and a whole lot more.
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Before we get to this interview with Neil deGrasse Tyson, we learn about one of the biggest problems in astrophysics, as a new study lends further evidence to questions about the expansion rate of the Universe. We also examine the oldest quasar jet ever seen radiating in X-rays. And, we look at a nearby exoplanet that lost one inhospitable atmosphere, just to grow one even more noxious.
Since the Big Bang, galaxies have raced apart from each other as the Universe expands. The rate of this expansion, called the Hubble constant, is still in question, as two different values are found, depending on where in the Universe the observation is made. Measurements made from nearby objects are nearly 10 percent higher than values obtained when looking at the early Universe. A new study of elliptical galaxies near the Milky Way confirmed the higher value found by other independent studies of nearby bodies. This reason for this discrepancy remains unexplained.
An ancient supermassive black hole and accompanying quasar jet recently discovered using the Chandra X-ray telescope is the oldest such body yet found. This supermassive body, 12.7 billion light years from Earth, emanates a powerful jet of energy. Seen in X-ray light, this jet extends 160,000 light years in length, 60 percent longer than the width of the Milky Way galaxy.
Examination of the exoplanet GJ 1132 b reveals this world may have once completely lost its atmosphere, before forming a second. Astronomers using the Hubble Space Telescope have found this planet, slightly larger than Earth, may have once possessed an atmosphere of hydrogen and helium, which was pushed off to space by pressure from its parent star. Today, GJ 1132 b is covered with an atmosphere rich in toxic gases, likely exuded from volcanic cracks within the thin crust of this alien world.
Join us next week on Astronomy News with The Cosmic Companion, when we will talk with physicist Dr. Lawrence Krauss, author of The Physics of Star Trek. We will discuss his new book, The Physics of Climate Change, as well as Star Trek tech! Subscribe or follow today and never miss an episode!
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