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Why don't we see any green stars?
00:08:38
RA, Dec and why do some stars never set?
00:10:01
How can you use altitude and azimuth to locate stars?
00:08:21
How far away is that star?  Understanding standard candles
00:07:23
Apparent and Absolute Magnitude:  How bright is that star?
00:09:00
Asteroid impact or elephant attack: Which is more dangerous?
00:08:34
Can I make a constellation in my classroom?
00:07:26
How far away is that star?  Understanding parallax
00:08:32
Why doesn't everyone see the same constellations?
00:10:03
How did we end up with exactly 88 constellations?
00:10:02
What happens after a supernova?
00:09:30
What happens when the Sun stops fusing hydrogen?
00:09:26
Birth of a star - from nebula to main sequence
00:12:38
A trillion Suns vs one lion - what could possibly go wrong?
00:08:28
How have telescopes evolved in the last 100 years?
00:12:19
Learning from my mistakes
00:10:28
Why were galaxies called nebulae until 100 years ago?
00:10:58
Exposure Time: The trick to seeing deep space
00:10:20
Astronomy meets GeoGuessr: Finding the Rebel in the Hunting Dogs
00:09:31
Last chance to see this on Saturn until 2040
00:09:37
What's in the box?
00:03:51
What is the darkest place in the Solar System?
00:09:04
How did ESA observe the longest solar eclipse in history?
00:09:56
Why we notice the Moon more during certain phases
00:07:12
What would happen if you teleported a trillion lions into the Sun?
00:10:58
How big are the planets?  Painting them to scale!
00:20:55
Why haven't we found aliens yet?
00:09:14
Could you skydive on Jupiter?
00:07:16
Why do we put telescopes on top of mountains?
00:08:26
What would the Moon and Earth look like to scale?
00:05:04