Astrophysics Quiz 2

How do you calculate Magnitude? focal length of scope/focal length of eye piece List the electro-magnetic spectrum from longest to short radio, microwaves, infrared, visible, ultraviolet, xray, gamma What are the four colors stars can be and what is their order? red, yellow, white, blue What is the wavelength of Read more…

Physics Option D, Astrophysics

Critical Density Density for which the curvature of the universe is zero/at which it will expand forever but will reach zero/at which the universe will begin to contract after an infinite amount of time. Stellar cluster Stars that are gravitationally bound forming an arrangement in space. Constellation A collection of Read more…

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 Read more…

Astrophysics Basic Terms

singularity point of infinite mass and infinite density in an infinitely small space, usually in a black hole light year 9.46073047 x 10^15 meters planet An astronomical object orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to 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 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 Read more…

Astrophysics Sun/Stars Quiz

Gravitational Contraction The process in which gravity causes an object to contract, thereby converting gravitational potential energy into thermal energy. This was a hypothesis proposed in the late 1800’s suggesting the Sun generates energy by contracting in size. However, geologists proved this wrong since the Earth was older than the Read more…

Astrophysics

What element is the sun most made from? Hydrogen Where do most stars go, when plotted into a graph of colour and brightness? Main sequence What is the final stage for massive stars? A supenova or black hole What is the largest planet? Jupiter What is cosmology? The study of Read more…

Astrophysics final

milky way galaxy – one out of billions/trillions – named by the greeks; galaxies kuklos, milky circle – Romans; via lactea= milky way – andromeda (closest galaxy to us) 2.3 million LY away – 400 billion solar masses galileo – 1st resolved milky way into stars – telescope william and Read more…

Astrophysics

The Universe A large collection of billions of galaxies Galaxy Large collection of billions of stars Our sun A star in the milky way galaxy Planets Orbit a star dwarf planet Small planets Moons orbit planets artificial satellite Orbit earth, built by humans Asteroids Lumps of rock and metal, found Read more…

Astrophysics Part 2

Kepler’s Third Law Square of the period of any planet is proportional to the cube of the semi major axis of its orbit Stellar Parallax Created by orbital position. Max shift is when the earth is at opposite sides of the sun. Once angle found, distance is calculated via trigonometry. 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 Read more…

Astrophysics IB PHYSICS HL

Solar system Mercury, venus, earth, mars, jupiter, saturn, uranus and neptune. Stellar clusters Groupings of a large number of stars bound by gravity. 1. Globular clusters: large number of mainly old stars. 2. Open clusters: small number of young stars that are farther apart. Galaxy A huge assembly of stars Read more…