Classifying Stars
This determines the color of a star.
What is it's temperature?
A group of stars held together by gravity.
What is a star cluster?
A large cloud of gas and dust in space.
What is a nebula?
A planet that orbits a star other than the sun.
What is an exoplanet?
A diagonal area on the H-R Diagram in which most stars are found.
What is Main Sequence?
The brightest stars in the sky are rated with this type of number on the Apparent Magnitude Scale.
What is a negative number?
An elongated oval shape.
What is an ellipse?
A small, hot, very dense star.
What is a white dwarf?
Two stars that revolve around each other.
What are binary stars?
The measure of a celestial body's brightness, as observed from Earth.
What is its Apparent Magnitude?
The actual brightness of a celestial object.
What is Absolute Magnitude?
This distance from Earth is used when calculating the Absolute Magnitude of a celestial body.
What is 32.6 light years?
A large, bright star with a low surface temperature.
What is a giant?
An exoplanet is usually detected by this factor in the star it is thought to orbit.
What is the star's wobble?
The amount of light radiated per second by a star.
What is a luminosity?
Where most of the stars are found on the H-R diagram.
What is Main Sequence?
A spinning neutron star that emits pulsating light and radio waves.
What is a pulsar?
Most scientists believe that all stars begin as this.
What is a nebula?
The most massive stars may become these after they explode.
What is a black hole?
The explosion of a massive star that causes a sudden increase in luminosity.
What is a supernova?
These three factors affect a star's apparent magnitude.
What are distance, surface temperature, and size?
The movement of stars as compared to Earth's sun.
What is proper motion?
The small, dense core left behind after a supernova.
What is a neutron star?
What are globular and open star clusters?
These two factors are used to plot stars on the H-R diagram.
What are Absolute Magnitude / Luminosity and Surface Temperature?