On post #6
On post #6
I'm using that line in class.
On post #3
Taking my physics class out for the Mars/Jupiter pairing if the clouds cooperate. Nothing sells orbital mechanics like seeing it with your own eyes.
On post #2
Halfway through a history of timekeeping. I now have too many opinions about longitude.
On post #45
How far into the season are the patches usually gone up there?
On post #20
As a teacher, the first week of dark afternoons always makes me nervous at pickup time.
On post #79
How do you tell when it's sharp enough? I'm never confident.
On post #28
Good one for class. Short enough that students actually watch it.
On post #8
Risk assessment first, then filming.
On post #30
I'm stealing this for the next time someone asks why teachers keep paper copies.
On post #36
Tails first or pins first? I keep reading strong opinions about this.
On post #29
How long does it take to dry properly? That's what always puts me off.
On post #21
I use these to find books to quit fifty pages into. It's a fun hobby.
On post #43
Learn the sky before you buy anything with a motor. A planisphere costs almost nothing.
On post #9
A nice one for talking about how little we can judge size without a reference.
On post #24
I give nonfiction even less. If the argument hasn't shown up by chapter two, it's a magazine article with ambitions.
On post #48
"Soon" in astronomy has a very generous error bar.