Light and Stars
The unit of measurement for wavelength.
What is nanometer (nm)?
This can escape from a black hole's event horizon.
What is nothing?
A graph showing the absolute magnitude plotted against the surface temperature for a group of stars.
What is Hertzsprung-Russell diagram (HR diagram)?
What is spiral shaped?
This is a non-contact force that acts on objects. If two objects are placed in space, they will be drawn towards each other by this force.
What is gravity?
Scientists have determined this to be about 186,000 miles per second.
What is the speed of light?
The force that keeps a main sequence star from collapsing on itself.
What is radiation pressure?
The most familiar part of the Milky Way galaxy.
All objects in the solar system travel around the sun in this kind of orbit that is not circular, but more oval shaped.
What is elliptical?
An increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other.
What is the Doppler Effect?
This stops at the event horizon of a black hole.
What is time?
The birthplaces of stars correspond to certain types of clouds in the interstellar medium.
What is dense and cold clouds?
The part of the galaxy where new star formation occurs.
What is the spiral arms?
This is the term used to describe a star that has stabilized.
What is a main-sequence star?
All objects emit light according to their surface temperature.
What is black body radiation?
It is more massive than the Sun, but is the size of a city.
What is a neutron star?
A flattened disk that has a central concentration of matter.
What is a protostar?
The most common star in the Milky Way Galaxy.
What is red dwarfs?
The outermost layer of the Sun?
The study of the interaction between matter and electromagnetic radiation.
What is spectroscopy?
Number of solar masses a star can be in diameter to eventually become a neutron star.
What is less than 8 solar masses?
The process that occurs when extremely high temperature and pressure cause less massive atomic nuclei to combine to form more massive nuclei and in the process release enormous amounts of energy.
What is nuclear fusion?
The distance to the Galactic Center from the Sun.
What is 8,000pc?
The most important property of a star.
What is mass?