
Sign up to save your podcasts
Or


Astronomers have seen stars and superhot gas flying in orbits that bring them very close to the supermassive black hole in the middle of our galaxy — and this has taught us a huge amount about the nature of black holes.
Black holes have no size, but have a huge mass — and there's an enormous one right in the middle of our galaxy.
Reckon you could measure the circumference of the Earth using just a stick and some basic geometry?
From the publisher's feed

98 Listeners

62 Listeners

119 Listeners

47 Listeners

28 Listeners

1,737 Listeners

772 Listeners

193 Listeners

755 Listeners

130 Listeners

21 Listeners

60 Listeners

52 Listeners

64 Listeners

160 Listeners

315 Listeners

1,124 Listeners

40 Listeners

10 Listeners

194 Listeners

114 Listeners

235 Listeners

1,007 Listeners

46 Listeners