terms & theories library
Learn about Terms & Theories in Astronomy and get information on topics related to Terms & Theories in Astronomy.
Featured Article: Bode's law
Bode's, BOH duhz, law is a scheme for representing the approximate distances of planets from the sun. See more »
- 1
- 2
Articles 1-20 of 27
Aberration
Aberration, ab uh RAY shuhn, in optics, is the failure of a lens or mirror to produce an image that is sharply focused and has the same proportions as the object being viewed.
See more »Astronomical unit
Astronomical unit (AU) is the unit used by astronomers to measure distances within the solar system.
See more »Baily's beads
Baily's beads are the brilliant points of light seen just as the sun's surface disappears behind the moon during an eclipse (see Eclipse).
See more »Black hole
Black hole is a region of space whose gravitational force is so strong that nothing can escape from it.
See more »Bode's law
Bode's, BOH duhz, law is a scheme for representing the approximate distances of planets from the sun.
See more »Brown dwarf
Brown dwarf is a dim heavenly body that has more mass than a planet but less mass than a star.
See more »Cosmic microwave background (CMB) radiation
Cosmic microwave background (CMB) radiation is energy left over from the early universe.
See more »Cosmology
Cosmology, kahz MAHL uh jee, in astronomy, is the study of the structure and development of the universe and the forces that shape it.
See more »Heliosphere
Heliosphere is a vast, teardrop-shaped region of space containing electrically charged particles given off by the sun.
See more »Interstellar medium
Interstellar medium is all the ordinary matter between the stars in a galaxy.
See more »Magnitude
Magnitude is the scale used by astronomers to measure the brightness of objects in space.
See more »Midnight sun
Midnight sun is a term used for the sun when it can be seen 24 hours a day in the earth's polar regions.
See more »Nebular hypothesis
Nebular hypothesis, NEHB yuh luhr hy POTH uh sihs, is a theory about the origin of the solar system.
See more »Oort cloud
Oort, oort or ohrt, cloud is a cluster of comets, smaller objects, and perhaps even planets in the outermost region of our solar system.
See more »Opposition
Opposition is a term that describes the relative position of two heavenly bodies when the earth comes closest to being directly between them.
See more »Orbit
Orbit is the path of a natural or artificial object that moves under the influence of a central force.
See more »- 1
- 2
Articles 1-20 of 27
Related Ad Categories
