Chapter 31 section 1+2 Flashcards
star pattern that appears to form images, is used by astronomers to locate and name stars, and often is named for mythological figure
constellation
telescope that collects and magnifies radio waves
radio telescope
distance light travels in one year- about 9.5 trillion km
light-year
device that disperses light on its component wavelengths, using a prism diffraction grating
spectroscope
interstellar cloud of gas, ice and dust
nebula
section of the H-R diagram that is plotted from the upper left to the lower right and contains 90 percent of all known stars
main sequence
late stage in a star’s life cycle that occurs when its hydrogen fuel is depleted, its core contracts and its outer layers expand and cool
giant star
giant star that has lost its outer layers, leaving behind a hot, dense core that continues to contract under gravity
white dwarf
a region in space that is so dense that nothing can escape its inward pull of gravity
black hole
iron accumulates in the core of a super giant star, energy is absorbed and the star can no longer absorbed and the star can no longer support itself
supernovas
when stars explodes, it leaves behind a ball of neutrons
neutron star
layer of sun that emits light into space
photosphere
darker, cooler areas of the sun’s photosphere
sunspots
How did some constellations get their names?
Animals, characters in stories, and tools
What is the constellation that is named after a great hunter?
Orion’s belt
What does canis major mean?
Big dog
What does canis minor mean?
small dog
How many basic optical telescopes are there?
2
What is the name of the telescope that uses a convex lens?
Refracting telescope
What is the name of the telescope that uses mirrors?
Reflecting telescope
Why are space telescopes are better than other telescopes?
Earth’s atmosphere limits what ground-based telescopes can achieve
What are the name of the space telescopes?
Chandra X-Ray Observatory and the Spritzer Space Telescope
What are the three things that a spectroscope can determain?
a star’s chemical composition, its surface temperature, and moving away from or toward earth.
If a star is farther away from earth what color would it be and what would the wave length be?
Red and the wavelength is less frequent
If a star is closer from earth what color would it be and what would the wave length be?
Blue and more frequent
Where do stars form from?
Nebula
What is the sun known as?
Giant star
What is the inner part of the sun?
the core
What is the second most inner layer of the sun?
the radiation zone
What is the third most inner layer of the sun?
The convection zone
What is thermal energy
produced by nuclear fusion in the core
What is the surface of the sun called?
photosphere
What is the atmosphere above the photosphere
Chromosphere and the corona
Are sun spots permanent features?
No
