Stars,Sun,Galaxie(s) QUIZ Flashcards
What is an optical telescope?
Uses lenses and mirrors to collect and focus light
What is a telescope?
A device that makes distant objects appear closer
What are the types of optical telescopes?
Reflecting and Refracting
What are the types of telescopes?
Radio and Optical
What is a reflecting telescope?
Uses curved mirror
What is a refracting telescope?
Uses convex lens to gather/focus light
What is a radio telescope?
Used to detect radio waves from objects in Space
What do other Radio telescopes detect?
Infrared radiation, short-wave lengths, ultraviolet radiation, etc….
What is an observatory?
A building that contains one or more telescopes.
Where are many observatories located?
High mountains. Some are in Space too
Why have astronomers built the largest optical telescopes on the tops of mountains?
They have less atmosphere to look through
What are constellations?
Imaginary pattern of stars named by the ancient observers
What are the five ways stars are classified?
Color Temperature Size Chemical Make-Up Brightness
What are the colors that prove a star’s temperature?
Blue-Hot
Yellow-In between
Red-cool
What does a star’s color tell?
A star’s temperature
Many stars are the same size as ____
Many starts are the same size of the sun
What are the size’s of a star?
Supergiant/Giant- Very large stars
Stars like sun- Considered medium sized
Neutrons- Smaller stars
What do scientist use for a star’s chemical make-up?
Scientists use a spectrograph
What’s is a spectrograph?
A device that breaks light into colors and produces an image to determine the element found in stars.
What does the brightness of stars depend on?
The star’s size and temperature
What is apparent brightness?
A star’s brightness as seen from Earth
What is absolute brightness?
This is a star’s brightness it would have if it were at a standard distance from Earth
The largest visible light telescopes are now all ______
Reflecting
What two factors determine how bright a star looks from Earth?
Distance to Star
Brightness
