Dark Energy
Guest Post: The Cosmic Energy Inventory
[/caption] Now that the old year has drawn to a close, it's traditional to take stock. And why not think…
GALEX Confirms Nature of Dark Energy
[/caption] From a JPL press release: A five-year survey of 200,000 galaxies, stretching back seven billion years in cosmic time,…
Antigravity Could Replace Dark Energy as Cause of Universe’s Expansion
[/caption] Since the late 20th century, astronomers have been aware of data that suggest the universe is not only expanding,…
Hubble Rules Out One Alternative to Dark Energy
[/caption] From a NASA press release: Astronomers using NASA's Hubble Space Telescope have ruled out an alternate theory on the…
Astronomers Now Closer to Understanding Dark Energy
Understanding something we can’t see has been a problem that astronomers have overcome in the past. Now, a group of…
New Technique Could Track Down Dark Energy
[/caption] From an NRAO press release: Dark energy is thescientists have given to what is causing the Universe…
Using Gravitational Lensing to Measure Age and Size of Universe
[/caption] Handy little tool, this gravitational lensing! Astronomers have used it to measure the shape of stars, look for exoplanets,…
Quintessence
Quintessence is one idea – hypothesis – of what dark energy is (remember that dark energy is the shorthand expression…
New Search for Dark Energy Goes Back in Time
[/caption] Baryon acoustic oscillation (BAO) sounds like it could be technobabble from a Star Trek episode. BAO is real, but…
Variability in Type 1A Supernovae Has Implications for Studying Dark Energy
[/caption] The discovery of dark energy, a mysterious force that is accelerating the expansion of the universe, was based on…