Astro 1 Study guides, Class notes & Summaries

ASTRO 1 (PSU) EXAM QUESTIONS WITH COMPLETE SOLUTIONS Copernicus - CORRECT ANSWER Had idea of sun centered universe (heliocentric) Keplers 1st law - CORRECT ANSWER Planets revolve around the sun in elliptical orbits w/ sun at the focus What best describes orbit of earth around the sun - CORRECT ANSWER Ellipse that is close to a circle Keplers 2nd law supports idea that when a plant is closer to the sun its speed is greater - True or False - CORRECT ANSWER ...

A headline reads, "Brightness of Star X has significantly decreased, now at a magnitude of 1.50." Given what you know of magnitude values of stars, which of these could the magnitude have plausibly been before the decrease in brightness? a. 2.3 b. 5 c. -1.7 d. -3.4 e. 0.2 correct answers e. 0.2 A scientist hypothesizes that drinking milk causes pimples in humans. He tests his hypothesis by drinking milk and observing his own skin. After consuming milk, the scientist breaks out in pim...

What causes day and night? - Rotation of Earth on its Axis How does the Sun appear to move in the sky in the course of a day? - East to West bc of Earth's rotation. The stars and planets move the same way, also bc Earth's rotation What happens to the Earth in one year? - It orbits the Sun one time Why do we have seasons? - Tilt of Earth's axis (not changing from Sun). The tilt is about 23 degrees How is the Earth's axis tilted when we have summer in the Northern hemisphere? - With the N...

Why do we see the Moon appear to go through phases as seen from Earth? A. The Moon reflects "Earthshine", so it depends on how much light from the Earth is hitting the Moon B. As the Moon rotates, it presents a different phase to us over the course of its "day". C. Depending on where the Moon is along its orbit, we see different amounts of its illuminated side D. The Earth's shadow blocks out part of the Moon from time to time - C. Depending on where the Moon is along its orbit, we see...

ASTRO 7N Unit 1 and 2 Game 2024 Questions & Answers | 100% Correct | Verified

ASTRO 102 FINAL EXAM STUDY GUIDE

Astro 7n Exam 1 Questions with 100% Correct Answers | Verified | Latest Update 2024

When determining a star's surface temperature, what do we need to know? - The peak wavelength of its blackbody spectrum The star Betelgeuse has a lower surface temperature than the Sun; therefore (with IR = infrared and UV = ultraviolet) - Betelgeuse emits more IR and more UV light than the Sun. You are gradually heating a lump of rock in an oven to an extremely high temperature. As it heats up, the lump emits nearly perfect theoretical blackbody radiation, meaning that it - Bluest when h...