Tag Archives | Early Universe

Hubble Space Telescope: 25 Years Exploring the Cosmos

Hubble captured this mountain of dust and gas rising in the Carina Nebula. The top of a three-light-year tall pillar of cool hydrogen is being worn away by the radiation of nearby stars, while stars within the pillar unleash jets of gas that stream from the peaks. Photo by NASA, ESA, and M. Livio and the Hubble 20th Anniversary Team (STScI)

Hubble captured this mountain of dust and gas rising in the Carina Nebula. The top of a three-light-year tall pillar of cool hydrogen is being worn away by the radiation of nearby stars, while stars within the pillar unleash jets of gas that stream from the peaks. Photo by NASA, ESA, and M. Livio and the Hubble 20th Anniversary Team (STScI)

Jasmine Wright and Margaret Myers Via PBS.org:

Hubble’s contributions to space exploration are countless. Its images, explains Hubble Space Telescope Senior Project Scientist Jennifer Wiseman, have shown the first definitive detection of supermassive black holes at the centers of galaxies. They also have provided measurement of the expansion rate of the universe, and detection (along with ground-based telescopes) of acceleration in that expansion, caused by mysterious “dark energy” that appears to be pushing the universe apart.

“Hubble will go down in history as having changed the textbooks by totally revolutionizing humanity’s view of the universe, and our place in it,” Wiseman says.

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Scientists Say They Can Now Test Theory Of Early Universe Being One Dimension

511px-Triangulum.nebula.arp.750pix

Site where stars are being born in Emission nebula NGC 604 2.7 million light years from Earth.

A relatively new theory suggests that the early stages of the universe may have been only one dimension and gradually gained more dimensions as it expanded. Does this mean the universe may eventually see a fourth dimension? Via Daily Mail:

Did the early universe have just one spatial dimension? That’s the mind-boggling question at the heart of a theory scientists say they are on the brink of solving.

The theory was first proposed by physicist Dejan Stojkovic and colleagues from the University of Buffalo in 2010.

They suggested that the early universe – which exploded from a single point and was tiny at first – was one-dimensional (like a straight line) before expanding to include two dimensions (like a plane) and then three, which is the world in which we live today.

The theory, if valid, would address important conundrums facing particle physicists.

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