Space Exploration|Complete Questions with A+
Graded Answers
main sequence
a diagonal area on an H-R diagram that includes more than 90 percent of all stars
white dwarf
A small, hot, dim star that is the leftover center of an old star
Luminosity
the true brightness of an object
light year
the distance light travels in one year
blueshifted
the doppler shift toward shorter wavelengths of light from an approaching object
Redshifted
stars moving away from Earth
Nebula
A large cloud of dust and gas in space
black hole
An object in space whose gravity is so strong not even light can escape.
neutron star
the small, dense remains of a high-mass star after a supernova
binary stars
pairs of stars that orbit one another
absolute magnitude
The actual brightness of a star
apparent magnitude
the brightness of a star as seen from Earth
spectrum
colored band produced when a beam of light passes through a prism
spiral galaxy
, a galaxy whose arms curve outward in a pinwheel pattern
Elliptical Galaxy
huge galaxy that is round or oval in shape
barred spiral galaxy
type of spiral galaxy with a bar of stars that runs through its center
Irregular Galaxy
A galaxy that does not have a regular shape
Andromeda Galaxy
a large spiral galaxy about 2 million light years away
Ellipse
A elongated circle, or oval shape, the shape of the planets orbit.
Proxima Centauri
closest star to the sun
celestial object
natural objects outside of Earth's atmosphere including stars, planets, moons, asteroids and meteors
Sirius
the brightest star in the night sky
Polaris
North Star
Ursa Major
Big Bear
Big Dipper
familiar shape within the constellation Ursa Major which contains the pointer stars
dwarf planet
a celestial body resembling a small planet but lacking certain technical criteria that are required for it
to be classed as such.
Ceres
Drawf planet found in the asteroid belt
Pluto
Graded Answers
main sequence
a diagonal area on an H-R diagram that includes more than 90 percent of all stars
white dwarf
A small, hot, dim star that is the leftover center of an old star
Luminosity
the true brightness of an object
light year
the distance light travels in one year
blueshifted
the doppler shift toward shorter wavelengths of light from an approaching object
Redshifted
stars moving away from Earth
Nebula
A large cloud of dust and gas in space
black hole
An object in space whose gravity is so strong not even light can escape.
neutron star
the small, dense remains of a high-mass star after a supernova
binary stars
pairs of stars that orbit one another
absolute magnitude
The actual brightness of a star
apparent magnitude
the brightness of a star as seen from Earth
spectrum
colored band produced when a beam of light passes through a prism
spiral galaxy
, a galaxy whose arms curve outward in a pinwheel pattern
Elliptical Galaxy
huge galaxy that is round or oval in shape
barred spiral galaxy
type of spiral galaxy with a bar of stars that runs through its center
Irregular Galaxy
A galaxy that does not have a regular shape
Andromeda Galaxy
a large spiral galaxy about 2 million light years away
Ellipse
A elongated circle, or oval shape, the shape of the planets orbit.
Proxima Centauri
closest star to the sun
celestial object
natural objects outside of Earth's atmosphere including stars, planets, moons, asteroids and meteors
Sirius
the brightest star in the night sky
Polaris
North Star
Ursa Major
Big Bear
Big Dipper
familiar shape within the constellation Ursa Major which contains the pointer stars
dwarf planet
a celestial body resembling a small planet but lacking certain technical criteria that are required for it
to be classed as such.
Ceres
Drawf planet found in the asteroid belt
Pluto
