ASTRO 1 FINAL EXAM PSU (ACTUAL 2025/2026) | 100
QUESTIONS WITH 100% VERIFIED CORRECT ANSWERS | |
LATEST UPDATE
What is a light year?distance that light travels in 1 year
What is the closest star to Earth besides the Sun? (4.2 ly away) proxima centauri
What is the age of the universe?14 billion years
What is our cosmic address? What is the Local Group?Earth, solar system, milky way galaxy, local group, local supercluster
what is angular resolution?ability to distinguish clearly between two small points in the sky
Why does using a camera (detector or an astronomical instrument) in conjunction with the 1 / 3
telescope enable you to see fainter objects than you would with your eye?detectors gather much more light than our eyes, can take images with longer exposure time than our eyes
Why do we put telescopes in space?earths atmosphere can distort the images since the photons are traveling through the atmosphere and being redirected into the telescope
What wavelengths is the Earth's atmosphere transparent to?visible and radio
What wavelengths is the Earth's atmosphere partly opaque?infrared and uv
What wavelengths is the Earth's atmosphere completely opaque?x ray and gamma rays
characteristics of Jovian vs. Terrestrial planets 2 / 3
terrestrial: small, rocky, close to sun, few moons, moderate
atmospheres, slow rotation rate, no rings
Jovian: large, gaseous, far from sun, many moons and rings, thicccc
atmospheres, fast rotation rate
formation of the solar system why do all the planets lie in nearly the same plane?formed from a large spinning disk of gas and particles, all on same plane
Which exoplanet detection technique is the only technique that can allow us to measure the size of an exoplanet?transit, can find the radius of the exoplanet
Which technique allows us to measure the mass of the planet?radial velocity
What are the properties of most exoplanets? What was surprising when they were first discovered?most are large, gaseous, large eccentric orbits
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