Science chapter 8
Home > Flashcards > Print Preview
The flashcards below were created by user
on FreezingBlue Flashcards
. What would you like to do?
Varying types of electromagnetic waves, from radio waves to gamma rays. Always travel at the speed of light.
Telescope that uses a lens to collect light from an object
A telescope that uses a mirror to collect the light from an object
An artificial object/Vehicle that orbits a Celestial body. Can also be a celestial body orbiting another of larger size.
Observatories that orbit the other planets. Usually made to take high resolution pictures not obtainable from Earth.
Solar nebula theory
The theory that describes how planets and stars formed from spinning contracting discs of dust and gas
A Celestial body made of superheated hydrogen and helium
A giant cloud of gas and dust, which could be the birthplace of most, if not all, Celestial bodies
The hot condensed object at the center of a nebula
The process where hydrogen nuclei fuse to form helium nuclei. This is also a process of energy production.
The sun's surface layer
Area of strong magnetic fields on the photosphere
Streams of fast moving charged particles released by the sun into the solar system
Fast moving charged particles released from the sun that collide with earth's or another celestial body's atmosphere
Importance of the sun
- Is needed for all life on earth
- Drive's most processes on earth
- Powers the windows and ocean currents
- Provides photosynthesis
The measure of the total amount of energy a star radiates per second. Measured in joules per second
A star's magnitude as seen from 32.6 light-years away from Earth
An instrument that produces a spectrum from an narrow beam of light, and projects it onto a photographic plate/digital detector
Certain wavelengths in a spectrum identified by lines. Spectral lines identify chemical elements.
Hertzsprung – Russell (H–R) diagram
A graph that compares the properties of stars
A band of stars on the H–R diagram that runs diagonally from the top–left to the bottom-right. 90% of stars are in the main sequence
A small, dim, yet very hot star.
A giant explosion where the entire outer parts of a star get blown off
A star so dense that only neutrons exist in its core
How low mass stars involved
Nebula, small protostar, red dwarf, Red main sequence star, white dwarf.
Low mass stars stay as main sequence stars for as long as 100 billion years. When they run out of hydrogen, they become white dwarfs
How intermediate mass stars evolve
- Nebula, medium protostar, yellow main sequence star, red giant, white dwarf.
- Intermediate mass stars bring their hydrogen faster than low mass stars, so they only last about 10 billion years. When their hydrogen runs out, they become red giants and eventually white dwarfs
How high mass stars evolve
- Nebula, large protostar, blue main sequence star, red supergiant, supernova, neutron star or blackhole.
- High mass stars bring their hydrogen the fastest so they die more quickly and violently. When the star explodes during a supernova, it becomes either neutron star or a black hole. It becomes a black hole when the solar mass is greater than 25 and it becomes a neutron star when the solar mass is between 12 and 15.
The result of the deaths of a star over 25 solar masses. the remnants of the supernova is crushed by gravity and nothing can escape it, not even light.
What would you like to do?
Home > Flashcards > Print Preview