Author Question: Iron meteorites are believed to come from: A) the core of a dense M-type asteroid, now broken up. ... (Read 31 times)

wrbasek0 · **on:** Jul 27, 2018

Iron meteorites are believed to come from:

A) the core of a dense M-type asteroid, now broken up.
B) Mars, hence their reddish color.
C) the crust of a differentiated type C asteroid, now broken up.
D) a broken up cometary nucleus, hence their shiny appearance.
E) deep space, far beyond the solar system, hence their unique crystal patterns.

Question 2

Describe at least three ways in which our solar system would be different if orbital resonances had never been important.

What will be an ideal response?

dantucker · **Reply #1 on:** Jul 27, 2018

Answer to Question 1

A

Answer to Question 2

Many possible answers; without orbital resonances: (1 ) The asteroids might have accreted into a single planet between Mars and Jupiter. (2 ) Comet orbits would not be nudged, so comets would not collide as frequently with Earth. (3 ) From the previous two ideas, Earth would not have been as heavily impacted. (4 ) Earth would not have received as many volatiles from the outer solar system. (5 ) Saturn's rings would not be broken into rings and gaps. (6 ) The asteroid belt would not have gaps. (7 ) Kuiper-belt objects would not clump into orbital groups. (8 ) Pluto and other Kuiper-belt objects would not be prevented from colliding with Neptune. (9 ) Io, Europa, and Ganymede would not be geologically active.