List of Astronomy Cast question shows
Encyclopedia
This is a list of Astronomy Cast
question shows released from July 2008, with links to relevant Wikipedia articles. Question shows prior to this date are included in the main episode lists as they have regular episode numbers.
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...
question shows released from July 2008, with links to relevant Wikipedia articles. Question shows prior to this date are included in the main episode lists as they have regular episode numbers.
| Subject | Date |
|---|---|
| Student Questions: Collinsville High School Collinsville High School Collinsville High School is a four-year comprehensive public high school in the Collinsville Community Unit School District 10. In 2011, Collinsville High School had an enrollment of 1,985 students.-Academics:... |
July 4, 2008 |
| Student Questions: Leelanau School | September 14, 2008 |
| Black Hole Black hole A black hole is a region of spacetime from which nothing, not even light, can escape. The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole there is a mathematically defined surface called an event horizon that... Surfaces, Magnetic Field Magnetic field A magnetic field is a mathematical description of the magnetic influence of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude ; as such it is a vector field.Technically, a magnetic field is a pseudo vector;... Strengths, and the Speed of Gravitons |
September 18, 2008 |
| Light Speed, Andromeda Galaxy Andromeda Galaxy The Andromeda Galaxy is a spiral galaxy approximately 2.5 million light-years from Earth in the constellation Andromeda. It is also known as Messier 31, M31, or NGC 224, and is often referred to as the Great Andromeda Nebula in older texts. Andromeda is the nearest spiral galaxy to the... , Dark Matter Dark matter In astronomy and cosmology, dark matter is matter that neither emits nor scatters light or other electromagnetic radiation, and so cannot be directly detected via optical or radio astronomy... and Black Holes |
September 26, 2008 |
| Running Out Of Gravitons and Hitting the Brakes at Light Speed | October 02, 2008 |
| Alignment with the Galactic Plane Galactic plane The galactic plane is the plane in which the majority of a disk-shaped galaxy's mass lies. The directions perpendicular to the galactic plane point to the galactic poles... , Destruction from 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... , and the Death of the 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... |
October 09, 2008 |
| Galactic Dust Cosmic dust Cosmic dust is a type of dust composed of particles in space which are a few molecules to 0.1 µm in size. Cosmic dust can be further distinguished by its astronomical location; for example: intergalactic dust, interstellar dust, interplanetary dust and circumplanetary dust .In our own Solar... , the Speed of Photons, and 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... Calculations |
October 20, 2008 |
| Relativity Theory of relativity The theory of relativity, or simply relativity, encompasses two theories of Albert Einstein: special relativity and general relativity. However, the word relativity is sometimes used in reference to Galilean invariance.... , Relativity and More Relativity |
October 23, 2008 |
| Orbit Orbit In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet around the center of a star system, such as the Solar System... of the Planets, Green Star Star A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth... s and Oort Cloud Oort cloud The Oort cloud , or the Öpik–Oort cloud , is a hypothesized spherical cloud of comets which may lie roughly 50,000 AU, or nearly a light-year, from the Sun. This places the cloud at nearly a quarter of the distance to Proxima Centauri, the nearest star to the Sun... Contamination |
October 30, 2008 |
| Ice in Space, Expansion of the Universe, and Death from the Skies Death from the Skies Death from the Skies!: These Are The Ways The World Will End is a book by the American astronomer Phil Plait, also known as "the Bad Astronomer". The book was released in 2008 and explores the various ways in which the human race could be rendered extinct by astronomical phenomena... |
November 6, 2008 |
| Spiral Arms, Seismic Waves Seismic wave Seismic waves are waves of energy that travel through the earth, and are a result of an earthquake, explosion, or a volcano that imparts low-frequency acoustic energy. Many other natural and anthropogenic sources create low amplitude waves commonly referred to as ambient vibrations. Seismic waves... on the Sun, and our Favourite Gear |
November 13, 2008 |
| Distance in Space, Changing Earth's Orbit, and Different Sized Stars | December 11, 2008 |
| Different Fields of Astronomy, Our Sibling Stars and Hidden Lagrange Points | December 18, 2008 |
| Stellar Roche Limit Roche limit The Roche limit , sometimes referred to as the Roche radius, is the distance within which a celestial body, held together only by its own gravity, will disintegrate due to a second celestial body's tidal forces exceeding the first body's gravitational self-attraction... s, Seeing Black Holes, and Water on Mars |
January 1, 2009 |
| Moons and 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... , Stars in the Void, and Rings Around Stars |
January 22, 2009 |
| Shooting Lasers at the Moon and Losing Contact with Rovers Mars Rover A Mars rover is an automated motor vehicle which propels itself across the surface of the planet Mars after landing.Rovers have several advantages over stationary landers: they examine more territory, they can be directed to interesting features, they can place themselves in sunny positions to... |
March 5, 2009 |
| Multiple Big Bangs, Satellite Collisions and the Size of the Universe | March 18, 2009 |
| Decelerating Black Holes, Earth-Sun Tidal Lock, and the Crushing Gravity of Dark Matter | March 31, 2009 |
| Undoing Inflation, Searching for Water, and Seeing Everything a Black Hole's Ever Eaten | April 16, 2009 |
| NorthEast Astronomy Forum (NEAF) | May 1, 2009 |
| Dangerous Solar Flares Solar flare A solar flare is a sudden brightening observed over the Sun surface or the solar limb, which is interpreted as a large energy release of up to 6 × 1025 joules of energy . The flare ejects clouds of electrons, ions, and atoms through the corona into space. These clouds typically reach Earth a day... , 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... Insights, and Light Speed Flashlights |
May 7, 2009 |
| The Source of Atmospheres, the Vanishing Moon, and a Glow After Sunset | May 19, 2009 |
| Hidden Fusion Nuclear fusion Nuclear fusion is the process by which two or more atomic nuclei join together, or "fuse", to form a single heavier nucleus. This is usually accompanied by the release or absorption of large quantities of energy... , the Speed of Neutrinos, and Hawking Radiation Hawking radiation Hawking radiation is a thermal radiation with a black body spectrum predicted to be emitted by black holes due to quantum effects. It is named after the physicist Stephen Hawking, who provided a theoretical argument for its existence in 1974, and sometimes also after the physicist Jacob Bekenstein... |
June 4, 2009 |
| An Unlocked Moon, Energy Into Black Holes, and the Space Station's Orbit | June 6, 2009 |
| 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... Suggestions, Black Hole Energy, and Universal Time Time Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects.... |
June 22, 2009 |
| Galileoscope, Black Hole Time, and What Exactly is Energy Energy In physics, energy is an indirectly observed quantity. It is often understood as the ability a physical system has to do work on other physical systems... ? |
June 26, 2009 |
| Avoiding the Heat Death, Orbiting Galaxies, and the Dangers of Space Radiation | July 4, 2009 |
| Black black holes, Unbalancing the Earth, and Space Pollution | July 5, 2009 |
| Matter Balance, Jumping Light Speed and Black Hole Star Formation | July 23, 2009 |
| Imaging Extrasolar Planets, Infinite Universe, Inside a Black Hole | July 27, 2009 |