#SpeedOfLight The spectacular concept of the expansion of the universe has given rise to new fields of study, such as experimental cosmology (data acquisition and observations) and the search for dark energy. #physics

#SpeedOfLight Less than a century ago, very strong evidence was found that the expansion of the universe means that galaxies are moving away from each other, and at the same time the light they emit is increasing its wavelength (red shift). #physics

#SpeedOfLight The expansion of the universe has important implications for the fate of the cosmos. If the expansion continues to accelerate, as current observations suggest, it may result in a future where galaxies drift apart, leading to the "Big Freeze" scenario. #physics

#SpeedOfLight Observations of distant galaxies have revealed that the farther they are from us, the faster they move away. This fact is known as Hubble's law and provides strong evidence for the expansion of the universe. #physics

#SpeedOfLight This expansion rate of the universe determines how quickly galaxies move away from each other and gives us information about the age and future of the universe. #physics

#SpeedOfLight The expansion speed of the universe is described by the Hubble constant, named after astronomer Edwin Hubble, its discoverer. #physics

#SpeedOfLight The concept of the expansion of the universe challenges our three-dimensional intuition and demands of ourselves a new way of thinking about the cosmos.

#SpeedOfLight The expansion of the universe is not like the expansion of an object as we observe it in everyday life. It is the fabric that makes up the universe itself that is stretching, pulling galaxies with it. #physics

#SpeedOfLight Finally, Earth was formed from the remains of supernovae. #physics

#SpeedOfLight Exploding stars (called supernovae) formed the most massive elements and dispersed them into space. #physics