List of 2007 Astronomy Cast episodes
Encyclopedia
This is a list of Astronomy Cast
episodes released in 2007, with links to relevant Wikipedia articles.
Astronomy Cast
Astronomy Cast is an educational nonprofit podcast discussing various topics in the field of astronomy. The specific subject matter of each episode shifts from week to week, ranging from planets and stars to cosmology and mythbusting...
episodes released in 2007, with links to relevant Wikipedia articles.
| Episode | Subject | Date |
|---|---|---|
| #17 | Where Does the Moon Moon The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more... Come From? |
January 1, 2007 |
| #18 | Black Holes Big and Small | January 8, 2007 |
| #19 | Comets, our icy friends from the Outer Solar System Solar System The Solar System consists of the Sun and the astronomical objects gravitationally bound in orbit around it, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. The vast majority of the system's mass is in the Sun... |
January 14, 2007 |
| #20 | What we learned from the American Astronomical Society American Astronomical Society The American Astronomical Society is an American society of professional astronomers and other interested individuals, headquartered in Washington, DC... |
January 21, 2007 |
| #21 | Questions Show #2: Black Hole Questions Answered | January 29, 2007 |
| #22 | Variable Star Variable Star Variable Star is a 2006 novel written by Spider Robinson based on the surviving seven pages of an eight-page 1955 novel outline by the late Robert A. Heinlein. The book is set in a divergent offshoot of Heinlein's Future History and contains many references to works by Heinlein and other authors... s |
February 5, 2007 |
| #23 | Counting Aliens Extraterrestrial life Extraterrestrial life is defined as life that does not originate from Earth... with the Drake Equation Drake equation The Drake equation is an equation used to estimate the number of detectable extraterrestrial civilizations in the Milky Way galaxy. It is used in the fields of exobiology and the Search for ExtraTerrestrial Intelligence... |
February 12, 2007 |
| #24 | The Fermi Paradox: Where Are All The Aliens? | February 19, 2007 |
| #25 | The story of galaxy evolution | February 26, 2007 |
| #26 | The Largest Structures in the Universe Supercluster Superclusters are large groups of smaller galaxy groups and clusters and are among the largest known structures of the cosmos. They are so large that they are not gravitationally bound and, consequently, partake in the Hubble expansion.-Existence:... |
March 5, 2007 |
| #27 | Questions Show #3: How can our eyes collect so many photons? What's the speed of gravity? Shouldn't the light from the cosmic microwave background radiation passed us by? | March 12, 2007 |
| #28 | What is the Universe expanding into? Metric expansion of space The metric expansion of space is the increase of distance between distant parts of the universe with time. It is an intrinsic expansion—that is, it is defined by the relative separation of parts of the universe and not by motion "outward" into preexisting space... |
March 19, 2007 |
| #29 | Asteroids make bad neighbors | March 26, 2007 |
| #30 | The Sun Sun The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields... , spots and all |
April 1, 2007 |
| #31 | String Theory String theory String theory is an active research framework in particle physics that attempts to reconcile quantum mechanics and general relativity. It is a contender for a theory of everything , a manner of describing the known fundamental forces and matter in a mathematically complete system... , Time Travel Time travel Time travel is the concept of moving between different points in time in a manner analogous to moving between different points in space. Time travel could hypothetically involve moving backward in time to a moment earlier than the starting point, or forward to the future of that point without the... , White Holes, Warp Speed, Multiple Dimensions Dimensions Dimensions is a French project that makes educational movies about mathematics, focusing on spatial geometry. It uses POV-Ray to render some of the animations, and the films are release under a Creative Commons licence.... , and before the Big Bang Big Bang The Big Bang theory is the prevailing cosmological model that explains the early development of the Universe. According to the Big Bang theory, the Universe was once in an extremely hot and dense state which expanded rapidly. This rapid expansion caused the young Universe to cool and resulted in... |
April 9, 2007 |
| #32 | The Search for Neutrino Neutrino A neutrino is an electrically neutral, weakly interacting elementary subatomic particle with a half-integer spin, chirality and a disputed but small non-zero mass. It is able to pass through ordinary matter almost unaffected... s |
April 16, 2007 |
| #33 | Choosing and using a telescope Telescope A telescope is an instrument that aids in the observation of remote objects by collecting electromagnetic radiation . The first known practical telescopes were invented in the Netherlands at the beginning of the 1600s , using glass lenses... |
April 25, 2007 |
| #34 | Discovering another Earth Extrasolar planet An extrasolar planet, or exoplanet, is a planet outside the Solar System. A total of such planets have been identified as of . It is now known that a substantial fraction of stars have planets, including perhaps half of all Sun-like stars... |
April 30, 2007 |
| #35 | Questions Show #4: Is there anti-dark matter? How come gravity can escape from a black hole? Do black holes capture dark matter? Can a moon have a moon? Can a planet have two stars? | May 7, 2007 |
| #36 | Gamma ray bursts | May 14, 2007 |
| #37 | Gravitational lensing | May 20, 2007 |
| #38 | Neutron stars and their exotic cousins | May 27, 2007 |
| #39 | Astrology Astrology Astrology consists of a number of belief systems which hold that there is a relationship between astronomical phenomena and events in the human world... and UFOs |
June 3, 2007 |
| #40 | American Astronomical Society meeting, May 2007 | June 10, 2007 |
| #41 | The rise of the supertelescopes | June 17, 2007 |
| #42 | Magnetism Magnetism Magnetism is a property of materials that respond at an atomic or subatomic level to an applied magnetic field. Ferromagnetism is the strongest and most familiar type of magnetism. It is responsible for the behavior of permanent magnets, which produce their own persistent magnetic fields, as well... everywhere |
June 25, 2007 |
| #43 | Questions Show #5: Is the Universe rotating? Is space something, or is it nothing? Is dark energy evenly distributed? | July 2, 2007 |
| #44 | Einstein's Albert Einstein Albert Einstein was a German-born theoretical physicist who developed the theory of general relativity, effecting a revolution in physics. For this achievement, Einstein is often regarded as the father of modern physics and one of the most prolific intellects in human history... Theory of General Relativity General relativity General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1916. It is the current description of gravitation in modern physics... |
July 9, 2007 |
| #45 | The Important numbers in the Universe | July 16, 2007 |
| #46 | Stellar Nurseries | July 23, 2007 |
| #47 | Tidal Forces Tidal force The tidal force is a secondary effect of the force of gravity and is responsible for the tides. It arises because the gravitational force per unit mass exerted on one body by a second body is not constant across its diameter, the side nearest to the second being more attracted by it than the side... |
July 30, 2007 |
| #48 | Tidal Forces Across the Universe | August 6, 2007 |
| #49 | Mercury Mercury (planet) Mercury is the innermost and smallest planet in the Solar System, orbiting the Sun once every 87.969 Earth days. The orbit of Mercury has the highest eccentricity of all the Solar System planets, and it has the smallest axial tilt. It completes three rotations about its axis for every two orbits... |
August 13, 2007 |
| #50 | Venus Venus Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent magnitude of −4.6, bright enough to cast shadows... |
August 20, 2007 |
| #51 | Earth Earth Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets... |
August 27, 2007 |
| #52 | Mars Mars Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance... |
September 3, 2007 |
| #53 | Astronomy in Science Fiction Science fiction Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities... |
September 10, 2007 |
| #54 | Questions Show #6: The Universe as a black hole, tidal locking of planets like Uranus, colors of stars at different ages, birthday of the Universe | September 17, 2007 |
| #55 | Asteroid Belt Asteroid belt The asteroid belt is the region of the Solar System located roughly between the orbits of the planets Mars and Jupiter. It is occupied by numerous irregularly shaped bodies called asteroids or minor planets... |
September 24, 2007 |
| #56 | Jupiter Jupiter Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is classified as a gas giant along with Saturn,... |
October 1, 2007 |
| #57 | Jupiter's Moons | October 10, 2007 |
| #58 | Inflation Cosmic inflation In physical cosmology, cosmic inflation, cosmological inflation or just inflation is the theorized extremely rapid exponential expansion of the early universe by a factor of at least 1078 in volume, driven by a negative-pressure vacuum energy density. The inflationary epoch comprises the first part... |
October 15, 2007 |
| #59 | Saturn Saturn Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Saturn is named after the Roman god Saturn, equated to the Greek Cronus , the Babylonian Ninurta and the Hindu Shani. Saturn's astronomical symbol represents the Roman god's sickle.Saturn,... |
October 22, 2007 |
| #60 | Questions Show #7: Questions on Inflation | October 29, 2007 |
| #61 | Saturn's moons | November 5, 2007 |
| #62 | Uranus Uranus Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. It is named after the ancient Greek deity of the sky Uranus , the father of Cronus and grandfather of Zeus... |
November 11, 2007 |
| #63 | Neptune Neptune Neptune is the eighth and farthest planet from the Sun in the Solar System. Named for the Roman god of the sea, it is the fourth-largest planet by diameter and the third largest by mass. Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times... |
November 19, 2007 |
| #64 | Pluto Pluto Pluto, formal designation 134340 Pluto, is the second-most-massive known dwarf planet in the Solar System and the tenth-most-massive body observed directly orbiting the Sun... and the Icy Outer Solar System |
November 26, 2007 |
| #65 | The End of Our Tour Through the Solar System | December 3, 2007 |
| #66 | How Amateurs Can Contribute to Astronomy | December 10, 2007 |
| #67 | Building a Career in Astronomy | December 17, 2007 |
| #68 | Globular cluster Globular cluster A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and relatively high stellar densities toward their centers. The name of this category of star cluster is... s |
December 24, 2007 |
| #69 | The Large Hadron Collider Large Hadron Collider The Large Hadron Collider is the world's largest and highest-energy particle accelerator. It is expected to address some of the most fundamental questions of physics, advancing the understanding of the deepest laws of nature.... and the Search for the Higgs Boson Higgs boson The Higgs boson is a hypothetical massive elementary particle that is predicted to exist by the Standard Model of particle physics. Its existence is postulated as a means of resolving inconsistencies in the Standard Model... |
December 31, 2007 |