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4 answers

Back in the day, they used telescopes and before that they used sextants. Today there is no need to "follow" planets...computers have the data stored. In fact, the NavStar system on my amatuer telescope automatically knows where any planet is...I don't have to do anything except push a button.

2007-02-27 08:52:51 · answer #1 · answered by Anonymous · 0 0

Scientist Use Tools To

2016-10-19 08:32:14 · answer #2 · answered by ? 4 · 0 0

Now days they use computers. Below are a couple sites you might be interested in.

2007-02-27 09:21:51 · answer #3 · answered by campbelp2002 7 · 0 0

A telescope.

2007-02-27 08:50:51 · answer #4 · answered by Nick W 3 · 1 0

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