earth science space Flashcards
origin of the universe?
the theory of the big bang in which a massise ancient explosion had push all matter outwards and is still expanding as the red shift theory
evidence of the big bang? Edwin Hubble?
EDwin hubble discovered that the universe is still expanding because through red shift in which as the light lengethed it is stretched on the spectrum to appear more red
two theories of the universe?
The big bang, in which the universe is still expanding to two red shift and microwave background radioation.
the steady state model theory. in which the universe is infinite.
the large hadron collider..
the large hadron collider propells small high energy particles to try to create the same effect as the big bang on a small scale.
two current space programs…
Space x dragon mission…
has had 167 days in space, has ahd 27 launches and last came down of the first of may with parachute descent.
NASA. ingenuity mars helicopter:
linked to the preserverance rover on mars
describe the measurement of space… parsec and light year
parsec: Causes you to see different views of the same object
Used to measure the distance between the Sun and other stars
1 parsec is equal to 3.26 light years
Light year: interstellar distance is distance between stars. 650 away means you see the light 650 later.
parsec and light year conversion?
Distance in parsecs= distance in ly/3.26
Distance in ly= distance in parsecsx 3.26
how apparent and absolute magnitude determines brightness of a star?
apparent magnitude is the distance between the star and earth the further away the star is seen from earth determines brightness of a star. =further away means dimmer.
absolute magnitude tis he magnitude (brightness) of a celestial object as it would be seen at a standard distance of 10 parsecs.
hwo the solar system was formed?
Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula
how the colour of a star demostrates the temperature of a star. (spectral class)
star emit differentsome of this is in the visible part of the specter (spectrometer) blue means hotter and red is colder.
How the Hertzsprung russle diagram is used to classify stars:
the herstprung diagram is plit into sections of super giants, main sequence and white dwarf. the top left of the diagram is bigger and hotter. the bottom right is colder and smaller.
what is nuclear fusion.
In the centre of the star, protons can fuse together to form positrons (tiny particles with a positive charge), and neutrino (a tiny neutral particle).
two opposing factors in a star.
gravity pulls matter into the center of star and radiation pressure pushes outwards
describe the following: nebulla and planetary nebulla
nebulla:A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases.
planetary nebula: A planetary nebula, is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars
Describe the following: red giant , super giant and black hole:
red giant’s very large star of high luminosity and low surface temperature\
supergiant:
Supergiant’s are the most massive stars. Supergiant’s can have masses from 10 to 70 solar masses and brightness from 30,000
Black holes: A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.
