Energy that can travel through space in the form of waves (like light you see produced by stars).
What is electromagnetic radiation?
100
Color, temperature, size, composition, and brightness.
What characteristics are used to classify a star?
100
Mass
How long a star lives depends on its ____.
100
Distant, enormously bright objects that look like stars
What are quasars?
100
Telescopes
Other ____ have longer wavelengths than visible light and shorter wavelengths than radio waves.
200
Devices used to detect radio waves in space
What are radio telescopes?
200
both its size and temperature.
The brightness of a star depends on...
200
Nebula
All star begin their lives as parts of a ____, a large cloud of gas and dust spread out in an immense volume.
200
Eclipsing binary
A system in which one star periodically blocks the light from another star is called a ____.
200
Spectrum
If you shine white light through a prism, the light spreads out into different colors and wave lengths, called a ____.
300
A building that contain one or more telescopes. They're usually located on mountaintops or in space.
What are observatories and where are they located?
300
Parallax is the apparent change in position of an object when looked at from different places. Astronomers usually use parallax to measure distances to nearby stars.
What is parallax and how do astronomers use it?
300
Protostar
A contracting cloud, from the nebula, with enough mass to form a star is a ____.
300
A galaxy that appears to have a bulge in the middle and arms that spiral outward, like pinwheels.
What is a spiral galaxy?
300
Electromagnetic Spectrum
The ____ includes the entire range of radio waves, infrared radiation, visible light, ultraviolet radiation, x- Rays, and gamma rays.
400
That collect and focus light & other forms of electromagnetic radiation.
What colors and temperatures are in cooler and hotter stars?
400
Planetary nebula
1. Nebula, 2. Low- mass protostar, 3. Low- mass star, 4. Red- giant, 5.____, 6. White dwarf, 7. Black dwarf
400
Elliptical galaxies
_____ look like a round and flattened ball, containing billions of stars with little gas and no longer form.
400
Spectrograph
A ____ is a device that breaks light into colors and produces an image of the resulting spectrum.
500
Refracting telescopes have convex lens, or transparent glass. Reflecting telescopes have curved mirrors.
What is the difference between refracting and reflecting telescopes?
500
The apparent brightness of a star is the brightness we see on Earth. The absolute brightness of a star is the brightness the star would have if it were at a standard distance from Earth.
What is the difference between apparent and absolute brightness?
500
Neutron star
1. Nebula, 2. high- mass protostar, 3. High- mass star, 4. Super-giant, 5. Supernova, 6. Either ____ or black hole
500
Irregular galaxies
_____ do not have a regular shape and appear smaller. They have bright, young stars and lots of gas and dust to form new stars.
500
Hertzsprung- Russell Diagram ( H- R Diagram)
The United States make graphs to find out of the temperature and absolute brightness of a star are related. This is called the ____.