# Space Part 1 -- Why does NASA launch spacecraft toward the East?

1. Jan 14, 2015

1. The problem statement, all variables and given/known data

Okay...So why does NASA launch in the east. Is there an advantage in east from west?
2. Relevant equations

3. The attempt at a solution

2. Jan 14, 2015

### DaveC426913

Since this is your homework, what do you think?

3. Jan 14, 2015

I think its because that is the way the earth rotates to, maybe to save fuel?

4. Jan 14, 2015

### DaveC426913

Go on...

5. Jan 14, 2015

### phinds

As Dave said, follow this train of thought. HOW does it save fuel?

6. Jan 14, 2015

Because, the shuttle or whatever will be heading int the east to west direction making it easier to get to the locations faster?

7. Jan 15, 2015

### UncertaintyAjay

What is the shuttles destination though? Not other places on earth. So...

8. Jan 24, 2015

no, I meant like, when they launch satellites or rovers onto other planets, they usually launch it east.

9. Jan 24, 2015

### haruspex

As you suggested in post #3, it's to do with the way the earth rotates.
When launching an object into space, what is the main challenge?
If you are on a train going at 90kph and throw a stone forwards at 30kph relative to you, how fast is the stone going?

10. Jan 24, 2015

Thanks! I get it now...

11. Jan 24, 2015

### DaveC426913

Yes. But before they head off into the outer solar system, where do they go? Where do ALL vessels launched from Earth go first?

12. Jan 24, 2015

Tooooo the atmosphere?

13. Jan 24, 2015

### DaveC426913

To orbit.

14. Jan 24, 2015

right...

15. Jan 24, 2015

### DaveC426913

And what do you need a lot of in order to stay in orbit?

16. Jan 24, 2015

Gravity?

17. Jan 24, 2015

### DaveC426913

Wouldn't gravity would do the opposite of keeping them in orbit?

What keeps them up there despite gravity?

18. Jan 24, 2015

Their free fall?

19. Jan 24, 2015

### DaveC426913

What is free fall? What is counteracting gravity?

Look at haruspex' post #9 for a hint.

20. Jan 24, 2015