Your Questions About Highly Eccentric Orbit
Jun 1st, 2012 by health

Betty asks…

Match the descriptions of the orbit in words with the descriptions?

Match the descriptions of the orbit in words with the descriptions
in numbers, and explain in each case what gave you the clue
that told you how to match it:

a. The motion of a baseball when a home run has been hit.
b. The orbit of a satellite launched by the simple means of
pushing it out of the bay of the Space Shuttle.
c. The motion of a spacecraft that is always located over
the same part of the Earth.
d. The motion of a spacecraft on its way from Earth to Mars.

Orbit 1: Semi-major axis = 1.262 AU, perihelion 1AU.
Orbit 2: Semi-major axis 3189km, highly eccentric.
Orbit 3. Orbital period 90 minutes, semi-major axis about 6500 km.
Orbit 4. Semi-major axis 36000 km, eccentricity 0.

health answers:

A – Orbit 2
b – Orbit 3
c – Orbit 4
d – Orbit 1

Richard asks…

According to Kepler’s third law?

A. Mercury travels fastest in the part of its orbit in which it is closest to the Sun.

B. Jupiter orbits the Sun at a faster speed than Saturn.

C. Pluto has a highly eccentric orbit.

health answers:

B

Paul asks…

Can someone please help me answer these questions… thank you?

An asteroid with an orbit lying entirely inside Earth’s

a. must have a highly eccentric orbit..
b. moves more slowly than Earth.
c. has a longer orbital period than Earth’s.
d. has an orbital semimajor axis of less than 1 AU.

Escape velocity is the speed required to

a. keep from falling out of orbit around an object.
b. overtake an object in orbit and pass it.
c. maintain a constant distance from an object.
d. overcome the graviational pull of an object.
e. orbit an object.

If the Moon’s orbit were a little larger, solar eclipses would be

a. more likely to be annular.
b. more frequent.
c. more likely to be total.
d. unchanged in appearance.

If the Moon orbited Earth twice as fast, but in the same orbit, the frequency of solar eclipses would

a. be cut in half.
b. double.
c. stay the same.

health answers:

An asteroid with an orbit lying entirely inside Earth’s: d

Escape velocity is the speed required to: d

If the Moon’s orbit were a little larger, solar eclipses would be: a

If the Moon orbited Earth twice as fast, but in the same orbit, the frequency of solar eclipses would: b

Steven asks…

Please help with this astronomy question?

Suppose a comet orbits the Sun on a highly eccentric orbit with an average (semimajor axis) distance of 1 AU. How long does it take to complete each orbit, and how do we know

A.)It depends on the eccentricity of the orbit, as described by Kepler’s first law.
B.) 1 year, which we know from Kepler’s third law.
C.) Each orbit should take about 2 years, because the eccentricity is so large.
D.) It depends on the eccentricity of the orbit, as described by Kepler’s second law.

health answers:

B

Kepler’s 3rd: “The square of the period of revolution is proportional to the cube of the semi major axis.”

Since the semi major axis equals one AU, the period of revolution will be the same as the Earth (because it also has a semi-major axis of 1 AU).

Mandy asks…

In what way is Uranus peculiar?

A) its orbit is highly eccentric
B) its orbit is highly inclined to the ecliptic plane
C) its satellites are in polar rather than equatorial orbits
D) its axis of rotation is near the ecliptic plane
E) its moons revolve in the same direction that the planet rotates

health answers:

D. It actually spins on its side.

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