Telescopes
A telescope that uses only lenses to concentrate light from an object and focus it into an image
Refractor Telescope
When recording the photo from your telescope, which is brighter, a star with a magnitude of -0.3 or one with a magnitude of +0.03?
Negative Numbers
The measure of the brightness of a star based on the amount of light a star emits and its distance from the earth
magnitude
The brightest and most luminous stars, several hundred times as large as the sun
Supergiant
A pattern of stars marked by coordinates of latitudes and longitudes in the night sky
Constellation
A telescope design that uses a concave mirror as the primary light-gathering optical component
Reflector Telescope
The lens nearest the object in a compound optical instrument
The large, light-gathering lens of a refractor telescope
Objective Lens
An unusually bright celestial object that produces strong radio emissions
Quasar
A very dense and bright star being the same mass of the sun but only a hundredth of its diameter
White dwarf
The star’s apparent motion across the sky perpendicularly
Proper Motion
A reflector telescope where the mirror is mounted at the bottom and top of the tube, and then reflected out to the side of the tube to the eyepiece
Newtonian Reflector
Two or more lenses of different kinds of glass mounted together to correct chromatic aberration (color distortion)
Compound Lenses
Millions of stars in a pattern around a gravitational center
Galaxy
An explosion in a star that causes it to increase in brightness up to 10 magnitudes but does not destroy it in the process.
It may explode again later
Nova
Placed in Earth’s orbit in 1990 by a space shuttle.
Has a 2.4 meter mirror in the telescope and operates with cameras, spectrometers, spectrographs, computers, and radio to receive and send data
Hubble Space Telescope
A reflector telescope in which the sky is viewed from behind the main mirror
Cassegrainian Reflector
The ability of a lens or mirror to visually separate two objects by focusing light to produce a clearer image
Resolution
A cloud of gas and dust in space
Nebula
A group of stars that appear to be relatively close to each other and have the same radial and proper motion
Star Cluster
The portion of a star’s motion that is either directly toward or away from earth.
Can be studied by examining different wavelengths in the star’s light
Radial Motion
A telescope that uses both a primary mirror and a large objective corrective lens as the main light-gathering elements
Composite Telescope
In telescope lenses, each color has different WHAT and slightly different angles of refraction where light bends to focus on different points
wavelengths
A region in space where gravity is so intense that matter, energy, and even light cannot escape from it
Black Hole
These can be bright, dark, or emission.
Nebula
Two stars revolving around each other as they periodically pass in front of each other relative to the observer
Eclipsing binary