askscience

Year:

Only show posts with narrations

Before the telescope was invented, how did people know that mercury, venus, and mars were planets if they didn't look any different from stars?

1 upvotes

Mark as read: Add to a list

1 upvotes

Mark as read: Add to a list

1 upvotes

Mark as read: Add to a list

Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Before the telescope was invented, how did people know that mercury, venus, and mars were planets if they didn't look any different from stars?	1
Why does graphite explode when it gets hot?	1
What is the clear fluid that comes out of a small hangnail if you peel it?	1