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Universe

Is dark energy needed to accelerate the expansion of the universe? (Image: Shutterstock)

Fans of Doctor Who will be very familiar with the stupefied phrase uttered by all new visitors to his Tardis: "It's...bigger...on the inside." As it turns out, this apparently irrational idea may have something to contribute to our understanding of the universe. A team of cosmologists in Finland and Poland propose that the observed acceleration of the expansion of the universe, usually explained by dark energy or modified laws of gravity, may actually be the result of regions of spacetime that are larger on the inside than they appear from the outside. The researchers have dubbed these "Tardis regions."  Read More

The HSC captured a high-resolution image of the entire Andromeda galaxy in one go (Image: ...

When taking snapshots, a good telephoto lens can be handy, but when your subject is 2.5 million light years away, it’s invaluable. To show off the capabilities of the new Hyper-Suprime Cam (HSC) located on Mauna Kea, Hawaii, an international team of astrophysicists has released high resolution images of the Andromeda galaxy that not only show off incredible detail, but may help shed light on the evolution of the Universe and the distribution of dark matter.  Read More

HD 140283 - the Methuselah star (Photo: Hubble via W.M. Keck Observatory)

An international team of scientists using one of the pair of 10-meter telescopes at the W.M. Keck Observatory on the summit of Mauna Kea on the island of Hawaii has now shown that the early moments of our Universe closely followed the theoretical model for the genesis of the elements. Improved observational and modeling methods show that the elemental composition of the post-Big Bang universe agrees with the predictions of that model, eliminating what was thought to be a substantial discrepancy between theory and observation.  Read More

Massive galaxy LRG 3-757 forms a gravitational lens for a second galaxy (blue ring) at a d...

Gravitational lenses, which are massive galaxies or galaxy clusters that act as a magnifying glass by bending light passing them, are one of the Universe's golden gifts to astronomers. To help unlock the mysteries that might lie behind these untapped celestial resources, Zooniverse, a program of the Citizens Science Alliance, has begun the Space Warps project. It allows citizen scientists to put their skills at pattern/image recognition to use, toward finding these fugitive gravitational lenses.  Read More

The ESA's Planck space telescope has revealed a detailed image showing the 'afterglow' of ...

A new image acquired by the European Space Agency's (ESA) Planck space telescope provides an unprecedented view of the oldest light in the Universe. The image represents the most detailed mapping of cosmic microwave background (CMB) ever created and both solidifies and questions our current understanding of the Universe.  Read More

An aerial view of the Chajnantor Plateau, home to the Atacama Large Millimeter/submillimet...

Even before the Atacama Large Millimeter/submillimeter Array (ALMA) was inaugurated this week, it was already rewriting history with its observations showing that a stellar baby boom took place much earlier than previously thought. But the pre-inauguration announcement isn’t a reflection that the ALMA team didn’t get to enjoy the official ceremony – like the first images released in 2011, the observations were taken while ALMA was still under construction.  Read More

The speed of entanglement dynamics is at least 10,000 times faster than light according to...

Quantum entanglement, one of the odder aspects of quantum theory, links the properties of particles even when they are separated by large distances. When a property of one of a pair of entangled particles is measured, the other "immediately" settles down into a state compatible with that measurement. So how fast is "immediately"? According to research by Prof. Juan Yin and colleagues at the University of Science and Technology of China in Shanghai, the lower limit to the speed associated with entanglement dynamics – or "spooky action at a distance" – is at least 10,000 times faster than light.  Read More

An artist's impression of eclipsing binaries (Image: ESO)

After close to a decade of observations, astronomers have accurately determined the distance to our neighboring galaxy, the Large Magellanic Cloud (LMC). The measurement, which calculates the distance at 163,000 light-years, was achieved by studying rare pairs of stars known as eclipsing binaries.  Read More

Hubble Ultra Deep Field, showing thousands of galaxies back to a time only a few hundred m...

It is dangerous to bet against Einstein. Cosmological research shows that the rate at which the Universe expands is increasing, rather than decreasing as was previously thought. The concept of "dark energy" with a negative pressure was introduced to describe this acceleration. Now measurements of the proton to electron mass ratio (PEMR) over the past seven billion years strongly suggest that the models of dark energy are far more contrived in explaining accelerating expansion than is Einstein's self-proclaimed "biggest blunder" – the cosmological constant.  Read More

Distant galaxy lensed by Cluster MACS J0647 (Image: NASA)

NASA's Hubble telescope has discovered the most distant object yet seen in the universe. The object, a galaxy called MACS0647-JD, is 13.3 billion light years from Earth and can only be seen with the help of a lens of intergalactic proportions. The light from MACS0647-JD left it only 420 million years after the Big Bang, so it provides a valuable look into the nature of the early universe.  Read More

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