Blackbody Radiation
This is the term for an object that absorbs all radiation incident on it and emits radiation based on its temperature.
What is a blackbody?
This is the name of the theory that describes the origin of the universe as a rapid expansion from a singularity.
What is the Big Bang Theory?
This law states that the square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.
What is Kepler's Third Law?
This equation describes the gravitational force between two masses, m1 and m2, separated by a distance r.
What is Newton's Law of Gravitation (F = Gm1m1/r2)?
Solar luminosity relates to distance in this way.
This law states that the wavelength at which a blackbody emits the most radiation, given by λmax=b/T
What is Wien's Displacement Law?
This is the apparent shift in the position of an object when viewed from two different locations.
What is parallax?
This is the process by which the Moon's gravitational pull creates two bulges on Earth's liquid surface.
What is tidal force?
This is the term for the point in a system where the gravitational force acts as if all the mass were concentrated.
What is the center of mass?
Although the Sun appears yellow from Earth, this is its true color when observed from space, due to its blackbody radiation curve peaking in this part of the visible spectrum.
What is white?
This formula relates a star's luminosity, radius and temperature: L = 4πR2σT4
What is the Stefan-Boltzmann Law?
This is the unit of distance used in astronomy, defined as the distance at which a star would have a parallax of 1 arcsecond.
What is a parsec?
These are points in a two-body system where a third object can remain in a stable position relative to the two larger bodies.
What are Lagrange points?
This is the value of the gravitational constant (G) in SI units.
What is 6.674×10−11N⋅m2/kg2?
This is the name of a group of old stars closely packed in symmetrical form.
What is a Globular Star Cluster?
As a blackbody's temperature increases, the peak wavelength of its emitted radiation approaches the end of the visible spectrum into this color
What is Blue/Violet?
The accelerating expansion of the universe is attributed to this mysterious force.
This formula calculates the escape velocity from the surface of a planet, where G is the gravitational constant, M is the planet's mass, and r is its radius.
What is v = sqrt(2GM/r)?
This distance from a celestial body marks the point where its gravitational pull overcomes the force keeping an object together.
What is the Roche Limit?
This is the name of the curve that describes the intensity of radiation emitted by a blackbody at different wavelengths.
What is the Planck curve?
This is the observed redshift of distant galaxies, which provides evidence for the expansion of the universe.
What is Hubble's Law?
This is the formula for the spherical law of cosines, relating the sides (a,b,c) and angles (A,B,C) of a spherical triangle.
What is cos(a) = cos(b)cos(c)+sin(b)sin(c)cos(A)?
This is the gravitational potential energy formula for two masses separated by a distance r.
What is U = −Gm1m2/r?
This layer of the sun may be seen with the naked eye.
What is the Photosphere?