Introduction (Narrated by Simon Steel) (in AUDIO ONLY)
585 views · Published 4 June 2008 · 1:27 · Indexed 20 September 2026
Channel: Chandra X-ray Observatory · 2008 · Science & Technology
The Universe is huge. Almost everything that we know about distant objects in the Universe comes from studying the light that is emitted or reflected by them. On Earth, geologists can study rocks by collecting them. Astronauts traveled to the Moon in 1969 and collected moon rocks, but the stars and galaxies are so far away that the primary way we can learn about them is from their light.
