How do we know how fast the universe is expanding? It's tricky

Scientists have discovered that a mysterious pressure dubbed "dark energy" makes up about 68% of the total energy content of the cosmos, but so far we don't know much more about it. Exploring the nature of dark energy is one of the primary reasons NASA is building the Wide Field Infrared Survey Telescope (WFIRST), a space telescope whose measurements will help illuminate the dark energy puzzle. With a better understanding of dark energy, we will have a better sense of the past and future evolution of the universe.

NASA's WFIRST will help uncover the universe's fate

Scientists have discovered that a mysterious pressure dubbed "dark energy" makes up about 68% of the total energy content of the cosmos, but so far we don't know much more about it. Exploring ...

Fri 13 Sep 19 from Phys.org

NASA's WFIRST Will Help Uncover the Universe's Fate, Sun 15 Sep 19 from SpaceDaily

NASA's WFIRST Space Telescope, a Refurbished Spysat Eye, Passes Early Review

NASA's repurposed spy telescope is ready for the next stage of development.

Wed 11 Sep 19 from SPACE.com

'Einstein's Biggest Blunder' May Have Finally Been Fixed

The cosmological constant has plagued physicists for more than a century.

Sun 8 Sep 19 from SPACE.com

'Einstein's Biggest Blunder' May Have Finally Been Fixed, Fri 6 Sep 19 from Livescience

A new equation may have finally solved Einstein’s ‘biggest blunder’

What's shocking is that even when he had a 'bad' idea, Einstein was still brilliant!

Fri 6 Sep 19 from ZME Science

High value for Hubble Constant from two gravitational lenses

Garching, Germany (SPX) Sep 16, 2019 The expansion rate of the universe today is described by the so-called Hubble constant, and different techniques have come to inconsistent results about ...

Sun 15 Sep 19 from SpaceDaily

Are black holes made of dark energy

Manoa HI (SPX) Sep 11, 2019 Two University of Hawaii at Manoa researchers have identified and corrected a subtle error that was made when applying Einstein's equations to model the growth ...

Wed 11 Sep 19 from SpaceDaily

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