# Just ran through a warmup that asked why an apple falls to the earth. Answer was obvious, but not exactly complete

The obvious answer was "due to earth's gravitational field." One of the other answers was "the Earth moves up to meet it." The second answer is half true, since both the Apple and Earth are being pulled towards eachother, or am I missing something?

Note by Jaymeson Lane
2 years, 10 months ago

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Confused, but I believe that the first answer is correct more than the second.

- 2 years, 10 months ago

What was the question?

Both the apple and the Earth move towards each other. In the ideal case, i.e., assuming that they are the only objects to move.

One technique for finding extrasolar planets is to measure the wobble of distant stars as planets orbit them. This wobble is detected by tiny Doppler shifts in starlight.

- 2 years, 10 months ago