When protons and electrons meet, they form hydrogen, releasing light.
This is how the first light in the universe was born, about 380,000 years after the Big Bang.
Soon, the universe went through a period of rapid expansion..
Cosmic rays can come from a variety of sources in space; but most of them are high-energy remnants of supernovae explosions.
Every time a muon collides with one of the 41 Geier-M\xfcller counters in the ARGOS installation, a light flashes.
The installation is part of the Hubble travelling exhibition Our Place in Space..
Light is energy that can take on many forms.
Radio waves, microwaves, infrared, visible, ultraviolet, X-ray and gamma radiation are all different forms of light..
Cosmic rays can come from a variety of sources in space; but most of them are high-energy remnants of supernovae explosions.
Every time a muon collides with one of the 41 Geier-M\xfcller counters in the ARGOS installation, a light flashes.
The installation is part of the Hubble travelling exhibition Our Place in Space..
It took 380,000 years for this hot, dense soup to thin and cool enough to allow light to travel through it.
This first light, dating back to the formation of early atoms, is called the cosmic microwave background and can still be detected today..
