Astro 1 Final Exam PSU | 100 Questions with 100% Correct Answers | Verified | Latest Update 2024
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 Order of planets in our solar system - Mercury, venus, earth, mars, jupiter, saturn, uranus, neptune What is the fastest speed in the universe? - speed of light Typical composition of stars - 74% H, 25% He, 1% Metals How old is the Sun/solar system? How much longer will it live? - 4.5 billion, live to 10 billion What is a star? - glowing ball of hot dense gas that generates its own energy via nuclear fusion What is the reason that we have seasons on Earth? - tilt of the earth's axis determines what hemisphere leans towards the sun If Earth's orbit were a perfect circle, how would this affect seasons? - Would not because earth's orbit is already very close to a perfect circle
Información del documento
- Subido en
- 29 de noviembre de 2023
- Número de páginas
- 11
- Escrito en
- 2023/2024
- Tipo
- Examen
- Contiene
- Preguntas y respuestas
