The Fermi Gamma-Ray Space Telescope has been orbiting Earth and scanning the sky for high-energy gamma ray photons since last summer, and its first 87 days of observations are now combined into less than four minutes in this time-lapse video.

The video shows a soft blue sky aglow with gamma radiation, punctuated by colorful bursts from bright gamma-ray sources.

Most of the blazes are aptly-named blazars, galaxies with active nuclei that shoot jets of plasma directly at Earth. Several are pulsars, remnants of dead stars that shine lighthouse-like beams on the sky as they rotate. Some of them (like PSR J1836+5925, singled out in the video) are gamma-ray–only pulsars, a new class of pulsars discovered by the Fermi telescope. The constant campfire-like glow at the bottom of the screen is the plane of the

Milky Way galaxy.

Every so often, a ball of fire seems to fall along an arc from the top right side of the screen to the bottom. This is our own sun, which gives off gamma radiation nearly a billion times more energetic than visible light when cosmic rays strike its photons.

NASA and the Fermi Large Area Telescope team released a series of time-lapse videos like this one of the twinkly gamma-ray sky.