big bang

What is Dark Energy? Inside our accelerating, expanding Universe – NASA Science

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What is Dark Energy? Inside our accelerating, expanding Universe – NASA Science

Around this same time in history, astronomer Vesto Slipher observed spiral galaxies using his telescope’s spectrograph, a device that splits light into the colors that make it up, much like the way a prism splits light into a rainbow. He used the spectrograph, a relatively recent invention at the time, to see the different wavelengths … Read more

NASA’s Hubble Space Telescope finds ‘something weird’ going on in universe

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NASA’s Hubble Space Telescope finds ‘something weird’ going on in universe

The universe’s expansion rate has fascinated astronomers for a long time. Since the initial studies by Edwin P. Hubble and Georges Lemaitre in the 1920s to the discovery of ‘dark energy’ in the 1990s, the field has advanced slowly but steadily. The Hubble Space Telescope has provided a huge amount of data to study and … Read more