Psu astro - Study guides, Class notes & Summaries

A planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to its orbital plane arounA planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to its orbital plane arounA planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to its orbital plane arounA planet in a nearly circular orbit with its rotation axis tilted by 5 degrees relative to its orbital plane arounA planet in a nearly circular orbit ...

PSU astro 7N UPDATED Exam Questions and CORRECT Answers Composition of the Sun - Ans 73% hydrogen, 25% helium Sun stability caused by - Ans balance of gravity (inward force) and hot interior gas pressure (outward force) Cause of interior gas pressure - Ans nuclear fusion reaction in the Sun's core, going on at 15 million Kelvin Dimensions of the Sun - Ans 109 x Earth's diameter, 333,000 x Earth's mass Sun's luminosity - Ans 4 x 10^24 Watt light bulbs

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PSU astro 7N midterm UPDATED Exam Questions and CORRECT Answers According to Newton's 2nd law of motion, if the net force acting on the object increases while the mass of the object remains constant, what happens to the acceleration? - Ans Acceleration increases If Each were moved to half its current distance from the sun how would the force of gravity by the sun on Earth change? - Ans 4x stronger what did Newton's Law of Universal Gravitation tell us about how gravity works? - Ans ...

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What two properties of a planet affect the gravity we feel on its surface? - Answer- Mass and radius Two planets have the same radius. If Planet A is 5 times more mass than Planet B, how does gravity differ on the surfaces of the two planets? - Answer- Gravity is 5 times stronger on planet A Say that there were a planet X in our Solar System with a mass 1/4 the mass of Earth and a radius 1/2 the radius of Earth. How will the gravity on its surface compare to the surface gravity of Earth? -...

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