What is a building that contains one or more telescopes?
Observatory
100
A black dwarf
What is the last stage of a low-mass star?
100
Name three telescopes that start with the letter R.
Refracting, Reflecting, and Radio Telescope.....
100
What instrument collects and focuses light and other forms of electromagnetic radiation called?
A telescope
100
What color do stars appear if they are the hottest stars?
They appear bluish.
200
What is a large cloud of dust spread out in an immense volume?
A Nebula
200
When a supergiant runs out of fuel, it can explode suddenly. What is this explosion called?
A supernova
200
What does the Hertzsprung-Russell Diagram explain?
The Hertzsprung-Russell Diagram explains the surface temperatures of stars, and the absolute brightness of the stars.
200
Who built the first reflecting telescope?
Isaac Newton
200
What are the characteristics of a star?
Color, temperature, size, composition, and brightness.
300
What kind of galaxy that appears to have a bulge in the middle and arms that spiral outward, like pinwheels?
Spiral galaxies
300
What goes after the supernova?
A Neutron Star or a Black Hole
300
What is a black hole?
A black hole is an object with gravity so strong that nothing, not even light, can escape.
300
What is a telescope that is used to detect radio waves from objects in space called?
A radio telescope
300
What is a device that breaks light into colors and produces an image of the resulting spectrum?
A spectrograph
400
What is the distance between the crest of one wave an the crest of the next wave?
Wavelength
400
What is the third stage of both stars?
A low-mass star or medium-mass star and a high-mass star
400
What do you call a star that is a member of groups of two or more stars?
A star system
400
What is the difference between a reflecting telescope, and a refracting telescope?
A reflecting telescope yeses a curved mirror to colect and focus light. A refracting telescope uses convex lenses to gather and focus light.
400
What is the difference between absolute brightness and apparent brightness?
Absolute brightness is the brightness the star would have if it were at the standard distance from earth. Apparent brightness is its brightness from as seen from earth.
500
What is the distance that light travels in one year, about 9.5 million million kilometers?
Light-year
500
How is a star born?
A star is born when the contracting gas and the dust from a nebula become so dense and hot that nuclear fusion starts.
500
What are the three types of galaxies do astromomers clasify galaxies?
Spiral, elliptical, and irregular.
500
How does a refracting telescope work?
A refracting telescope works by using convex lenses to gather and focus light. It has two convex lenses, one on each end of the long tube. Light enters thought the large lens at the top. Then the lens focuses the light at a certain distance from the lens. The distance is the focal length of the lens. Last the eyepiece lens magnifies the image made by the objective lens.
500
What does the brightness of a star depend on?
The brightness of a star depends on both its size and temperature.