3 Which of the following is a similarity among asteroids, comets, and meteoroids?
А
They are remnants of the formation of the solar system.
B
None of them possess atmospheres of their own.
с
They may be seen from Earth with a telescope.
D
All of the above.
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Answerstudying coal cumbustion as an energy source;

1. why does the same side of the moon always face earthc.the rotational period of the moon is equal to one revolution around earth2. which is greater the moons period of rotation or its period of revolution  b.the moons revolution period around earth3.what was the major accomplishment of the apollo missions  c.sending the first human into space4. which of these space missions involved the deployment of lunar roversa. voyager 15. which scientists are going to explore next on kepler-186fd. evidence of existence of life6.which mission is not going to explore the outside of the solar  systemb.safir7.which technology limit the future of space explorationb. scientist must first develop certain technologies before missions can be completed.