Astr 101 Study guides, Class notes & Summaries

What are the three characteristics a planet must have? Correct Answer-1. Orbits the sun 2. has sufficient mass to assume round shape 3. cleared the neighborhood around its orbit What are the three characteristics a star must have? Correct Answer-1. luminous ball of gas 2. mostly hydrogen 3. held by own gravity What is an asterism? Give an example Correct Answer-A pattern or projection *Big dipper What is a constellation? Give an example Correct Answer-Help to locate other objects *Ursa ...

ASTR 101 Questions with Complete Solution3.

ASTR 101 Questions with Complete Solution2

Stellar Parallax Correct Answer-Shift of position of nearby star in comparison to distant objects. D=1/p (Distance in parsecs, parallax in arc seconds) Only works for nearby stars (within 3000 light years) because you need to measure the parallax angle which becomes smaller as distance increases. You use the position of the star in comparison to other further away stars. Mars Correct Answer-.11 Earth Masses 260 degrees K no evidence for life, no methane (could have supported life in the p...

ASTR 101 exam 3 UNC Questions with complete Solutions.

Position Correct Answer-Where the object is located Velocity and speed Correct Answer-How fast the object is going Velocity includes the magnitude and direction Speed is like mph, etc. Acceleration Correct Answer-The rate at which the velocity is changing, or any change in velocity (increase in speed, decrease in speed, or change in direction) Force and Net Force Correct Answer-Force = a push or pull on an object Net Force = Overall force; the sum of all the forces acting on an ...

What are the three types of spectra? Correct Answer-Continuous, emission, and absorption spectra What creates a continuous spectrum and what does it look like? Correct Answer-A hot solid, such as a star. All of the color is shown on the spectrum. There are no breaks. What creates an emission line spectrum and what does it look like? Correct Answer-A hot gas, such as a nebula. Only breaks in color are shown. What creates an absorption spectrum and what does it look like? Correct An...

ASTR 101 EXAM 1 WANG Questions with Complete Solutions

Based on what you have learned about seasons, why is it generally hotter in summer than in winter? Check all that apply a. The sun is higher in the sky in the summer b. We are closer to the Sun in the summer c. Earth rotates more rapidly in summer. d. We have more hours of daylight in summer e. Our half of the Earth is closer to the Sun in the summer Correct Answer-A and D What would happen to our seasons if Earth's axis tilt were different from its actual 23.5°? This series of probl...

Center of the Solar System Correct Answer-Sun Planets Orbit Correct Answer-Counter Clockwise T/F: Venus's day is longer than a year Correct Answer-True T/F: All planets take a year to go around the sun Correct Answer-False About how many times has Neptune orbited then sun since 1864 Correct Answer-1 0.4 AU goes with what planet? Correct Answer-Mercury The planets are in range of this many miles away. Correct Answer-tens of millions T/F: A light year is critical for measurin...