Astrophysics Flashcards

Astrophysics PART 4

Newton’s Model of the Universe The universe is infinite in both space and time. It is uniform and static. Meaning there are an infinite number of stars heading out in all directions to infinity (otherwise the universe would collapse under its own gravitational force) Obler’s Paradox Question Why is the night sky dark? or Why […]

Read more
Physics – Topic D: Astrophysics – D.1 Stellar Quantities

Comets Comets are irregular objects a few kilometres across comprising of frozen gases, rock and dust. Stars (Single & Binary) All stars initially form when gravity causes gas in a nebula to condense. As the atoms move towards one another, they lose gravitational potential energy that is converted into kinetic energy. This raises the temperature […]

Read more
Frosci midterm (Brain and Behavior + Astrophysics)

neuron cells – nerve cells – carry electrical pulses that transfer from 1 neuron to another – over 100 billion in brain – 3 parts: 1. cell body (grey matter) 2. dendrites (grey matter) 3. axons (white coated in myelin) signals picked up by dendrites –> cell body –> action potentials (electrical charge) –> axon […]

Read more
IB Physics Option D Astrophysics

Asteroid Small rocky body that drifts around the solar system Meteoroid Asteroid on a collision course with another planet Comets Mixtures of rocks and ice in very elliptical orbits around the Sun Nebula Cloud of gas and dust where stars begin to form Binary stars Two or more stars orbiting around their common centre of […]

Read more
Chapter 5 AstroPhysics

Refracting telescopes are so called for which of the following reasons? The light is bent to a focus. Which of the following is the first thing light hits when it enters a telescope? the primary lens or mirror In a telescope, which of the following is the optical element with the shortest focal length? the […]

Read more
IB Option E: Astrophysics: Stellar radiation and stellar types

Fusion the main energy source of stars How stars are formed Stars are formed by interstellar dust coming together through mutual gravitational attraction. Loss in potential energy as this happens can (if the initial mass of the dust collection is sufficient) produce high temperatures necessary for fusion. The fusion process produces a radiation pressure that […]

Read more
IB Physics standard level option E Astrophysics

Luminosity how bright a star will be in relation to the sun if all star were the same distance from the observer Light Year the distance light travels in one year Ellipse A elongated circle, or oval shape, the shape of the planets orbit. Astronomical Unit The average distance between Earth and the sun, about […]

Read more
IB Physics Topic Option E Astrophysics

Define a planet. •Celestial body that orbits around the sun •has sufficient mass for its self gravity •has cleared the neighborhood around its orbit Define astroids. Between orbits of Mars and Jupiter, smaller orbiting bodies Define comets. •small orbiting body •loose particles of ice and rock that are blown off by the solar wind forming […]

Read more
Glossary (Nuclear, Thermal and Astrophysics) AQA Physics A Unit 5A

Absolute magnitude (M) The apparent magnitude a star would have if it were placed at a standard distance of 10 pc from Earth. m – M = 5 log(d/10) where d is the distance in parsecs. Activity (A) The number of emissions per second, measured in Becquerels. Airy disc The bright central region in an […]

Read more
AQA Physics Astrophysics

Convex lens A lens that causes light to be focused towards a point, an image formed is real, inverted Concave lens A lens that causes light to spread out, an image formed is vertual and diminished Focal point The point at which several light rays converge Magnifying power The ratio of the objective lens focal […]

Read more
astrophysics test 3

Milky way diameter 100,000 LY how many stars in milky way 100-400 billlion stars different naming of milky way greeks galaxies kuklos (milky circle) then romans named: via lactea (milky way) distances by cepheid variable stars henrietta leavitt 1912 vary in luminosity/time determining size by open star clusters and globular clusters open star clusters- location […]

Read more
Astrophysics Study Guide Answers

Binary Star Two stars orbiting a common centre Black Dwarf The remnant of a white dwarf after it has cooled down. It has very low luminosity. Black Hole A singularity in space-time; the end result in the evolution of a very massive star. Brown Dwarf Gas and dust that did not reach high enough temperatures […]

Read more
OCR Physics A Astrophysics and Medical Physics Definitions

planet Orbits a star and has sufficient mass that its own gravity gives it a round shape. It has no fusion and it has cleared its orbit of most other objects. planetary satellite A body in orbit around a planet (includes moons and artificial satellites). main sequence The main period in a stars life when […]

Read more
Physics – Option E – Astrophysics

Absolute magnitude The apparent magnitude a star would have if observed from a distance of 10 pc. Apparent brightness The received energy per second per unit area of detector. It equals b = L/4(pi)d^2. Its units are Wm^-2. Apparent magnitude A measure of brightness of a star as seen form earth in a relative system […]

Read more
Astrophysics Definitions

What is the universe? a large collection of billions of galaxies What is a galaxy? A large cluster of stars What is a solar system? a star with orbiting planets What is a planet? A large sphere of matter that orbits the sun What is an exoplanet? A planet orbiting around a star other than […]

Read more
AST 101 Exam 2 Laws of Astrophysics

Keplers 1st Law (Orbital Motion) Planets travel in elliptical orbits with the sun as a focus Keplers 2nd Law (Orbital Motion) The line going from the Sun to the planet sweeps out equal areas in equal times *Explains relationship between planets around the sun Keplers 3rd Law (Orbital Motion) The time that a planet takes […]

Read more
Astrophysics for People in a Hurry

Einstein’s General Theory of Relativity The presence of matter and energy curves the fabric of space and time around it. Molecules A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction. Atoms A unit of matter; the smallest unit of a chemical […]

Read more
Astrophysics Questions And Answers

Outline the likely evolution of the star Khad after it leaves the main sequence Since it has a mass greater than 1.3 Ms, it will go through a super red giant, onto a supernova to a neutron star or black hole. Red supergiant star: • Large luminosity • Red color • Relatively low surface temperature […]

Read more
Astrophysics Questions

When did Pluto become a dwarf planet? August 2006 How many planets are in our solar system? 8 planets What is our solar system called The Milky Way How long does it take to get to the sun 19 years Who was the first person to land on the moon Neil Armstrong

Read more
Astrophysics Vocab Physics IB

Binary star Two stars orbiting around a common center Black dwarf The remnant of a white dwarf after it has cooled down. It has a low luminosity. Black hole A singularity in space- time; the end result in the evolution of a massive star. Brown dwarf Gas and dust that did not reach high enough […]

Read more
Astrophysics concepts study guide

Outline general structure of solar system Order of planets: (including order in mass and radius; smallest to largest.) Mercury; 1, 1 Venus; 3, 3 Earth;4, 4 Mars; 2, 2 Jupiter; 8,8 Saturn; 7,7 Uranus; 5, 6 Neptune; 6, Distinguish between stellar cluster and a constellation CONSTELLATIONS: Stars that look like they are close together but […]

Read more

Get instant access to
all materials

Become a Member