Star Chart and Naming
What 4 pieces of information do you need to locate a star on a star map?
Magnitude is a measure of what?
Brightness
What type of explosion leaves behind a neutron star?
Supernova
What is the name of a group of stars that have the same motion, but are relatively far apart?
Open star cluster
Which magnitude represents the brightest star:
+0.5
+3.2
0
-0.5
You can tell that a star is located north of the celestial equator because…
It has a positive Declination value
What unit do astronomers use to measure distance in space?
Light Years
What is the name of a star explosion that does not destroy the star but will just make it a little smaller than before?
Nova
What is the name of a group of stars with the same motion that are relatively close together?
Globular star cluster
What is the relationship between frequency and wavelength?
Inversely proportional. As one increases, the other decreases.
In addition to Bayer’s system, stars have other names which are in what language?
Arabic
A star is cold if it is what color?
Red
What is the name of a star that changes in brightness as it expands and contracts?
Cepheid Variables
What is a grouping of millions of stars called? The Milky Way and Andromeda are examples.
Galaxies
What is the doppler effect?
The doppler effect is the change is frequency of a wave due to an observer moving towards/away from the wave.
Name this star with Bayer’s naming system: second brightest star in constellation Pegasus.
Beta Pegasus
If a star is moving towards us, what type of motion does this describe (radial or proper)? What color would it appear?
Radial/blue
What is the name of a pair of stars that revolve around one another and can therefore change the apparent magnitude of the stars?
Eclipsing binaries
What is the name for clouds of dust and gas? Name three types.
Nebula (types include dark, emission, reflection, planetary, and supernova remnants)
What color will a star be if it is moving away from earth. Why? Use the words frequency and wavelength in your answer.
Red. When an object like a star or planet is releasing light waves and is moving away from earth, the waves will spread out, which will increase the wavelength and decrease the frequency. Light in the visible spectrum that has decreased frequency is closer to the red end of the spectrum so the light appears red. This is called red shift.
Name this star with Bayer's naming system: Brightest star in constellation Cassiopeia.
What shape is the asterism of Cassiopeia?
Alpha Cassiopeiae
W asterism
What are the 5 categories we used to classify stars?
Write a sentence to describe all of them.
1. Distance: Measured in LY, effects brightness of stars
2. Brightness: called Magnitude. Measured with a modern version of Hipparchus' scale where negative numbers are the brightest.
3. Size: Is associated with color (hot is small, cold is big)
4. Color: Color is a result of the temperature (red is cold and white/blue is hot)
5. Motion: Can be proper (slight movement in asterisms) or radial motion (moving towards or away from us, red shift and blue shift)
A neutron star is made up of what?
Neutrons
Nobody knows how I am created, but scientists predict that if a very large star (with a mass 3x greater than the sun) explodes in a supernova, all the gas will collapse to create me. What am I?
A black hole
Describe the Greek myth of one of these constellations: Orion, Cassiopeia, Ursa Major, Canis Major, Centaurus, Crux, Carina
Will vary