00:01On this day in space.
00:04On April 27th, 1961, NASA launched Explorer 11, a satellite that contained the first gamma-ray telescope to go to space.
00:12This marked the birth of space-based gamma-ray astronomy.
00:15Gamma-rays are a form of electromagnetic radiation and have the highest energy of any kind of wave in the electromagnetic spectrum.
00:22These waves come from things like supernova explosions, supermassive black holes, and even solar flares.
00:27Before Explorer 11 launched to look for gamma rays in space, scientists were pretty sure that gamma rays were out there.
00:34However, they had no way of detecting these gamma rays because they get absorbed in Earth's atmosphere.
00:39Explorer 11 discovered 22 cosmic gamma rays during its seven-month mission.
00:44These rays were coming from all over the place and didn't seem to point to any particular sources out in space.
00:50This observation became the first evidence of a uniform gamma ray background in the universe.
00:54And that's what happened on this day in space.
00:57And that's what happened on this day in space.
00:58Camino
01:05Fans are bright.
01:07That you think Golan maybe are at a time-bayern smarter than the background of cometula?
01:08This could do some of them.
01:10rethink theним Parents.
01:11Where does it know no they're in you?
01:12This could yapáºy.
01:14That's so bright.
01:15Mickey McStarkis gives such a good energy and this, so Mariura, the eyes, especially for change ideas.
01:18And that was absolutely wonderful.
01:20And that was a superpower.
01:22You have been very rich.
01:23That's it.
01:25Remember myeker's own.
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