List of Astronomy Cast question shows
Encyclopedia
This is a list of Astronomy Cast
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

External links

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