1. An alien spacecraft in an elliptical orbit around earth could possess which o
ID: 121038 • Letter: 1
Question
1. An alien spacecraft in an elliptical orbit around earth could possess which of the following properties?
a. Positive total energy relative to earth
b. an orbital eccentricity of e = 0.16
c. an orbital speed of 14 km/s relative to Earth’s surface.
d. An orbital period of 83 minutes.
2. whrere do we usually find asteroids in the solar system?
3. which of the following is observed as a property of every Jovian planet in our solar system?
a. moons with active volcanism
b. solid surfaces
c. large axis tilts
d. moons larger than earth’s moon
e. ring systems
4. The composition of the nebula is dominated by ___ and ___.
5. The moon in the solar system with subsurface ocean water is ____. The most volcanically active moon in the solar system is ____. The largest captured moon in the solar system is ____ .
6. Where does the Sun SET on Oct 8? Where does the Sun RISE on Jun 27? Where does the Sun SET on March 21? Where does the Sun RISE on September 21?
7. A newly discovered comet orbit the sun at an average distance of 2.2 AU with an eccentricity of 0.1? Calculate the comet’s orbital period.
8. A Kuiper belt object orbits the sun at an average distance of 43.4 AU with an eccentricity of e = 0.15.
Calculate the comets periphelion distance in AU using the equation:
Periphelion = a (1 – e )
Give your answer to one decimal place.
9. A Kuiper belt object orbits the sun at an average distance of 43.4 AU with an eccentricity of e = 0.15.
Calculate the comets aphelion distance in AU using the equation:
Aphelion = a (1 + e )
Give your answer to one decimal place.
10. How strong would the gravitational attraction be (in units of Earth- pulls) between Saturn and the Sun, given that Saturn is 95 earth- masses and is located at 9.54 AU from the Sun?
Explanation / Answer
SOLUTION:-1.
1)a) The elliptical orbit would NOT have positive total energy. Positive total energy would correspond to a hyperbolic orbit; the object would use that positive energy to escape the orbital pull of the sun.
b) An eccentricity of 0.16 is entirely possible. This would describe a fairly elliptical orbit, because an eccentricity of 0 would correspond to a circular orbit. The Earth's eccentricity is about 0.017, which corresponds to a...
c) this statement is also not possible because, of its greater speed.
d) An orbital period of 83 minute or any time duration will bepossible, because an elliptical orbit sets no limits on the total orbital period
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