Heavens

Why is the universe expanding? And accelerating?

What causes the accelerating expansion of our universe?

Solve that mystery and you reconcile two successful, yet incompatible, theories that explain how our universe works: quantum mechanics and Einstein’s theory of general relativity. But it isn't that simple. It may be that space-time itself is relative and if we zoomed in – way in – on the universe, we would realize it’s made up of constantly fluctuating space and time.

Exotic binary identified as a white dwarf pulsar - except those don't exist

Exotic binary identified as a white dwarf pulsar - except those don't exist

An exotic binary star system 380 light-years away has been identified as a white dwarf pulsar – yet those were believed not to exist anywhere in the universe.

Which means we still don't even know what we don't know.

White pulsars were discovered in the 1960s and associated with neutron stars.

A simpler way to estimate the feedback between permafrost carbon and climate

A simpler way to estimate the feedback between permafrost carbon and climate

One of the big unknowns in predicting climate change is the billions of tons of carbon frozen in Arctic permafrost. As global warming causes soil temperatures to increase, some of this carbon will decompose and enter the atmosphere and accelerate climate change.

Stickney crater: How a Martian moon became the 'Death Star'

Stickney crater: How a Martian moon became the 'Death Star'

Mars' largest moon, Phobos, has captured public imagination and been shrouded in mystery for decades. But numerical simulations recently conducted at Lawrence Livermore National Laboratory (LLNL) have shed some light on the enigmatic satellite.

Proxima Centauri may be more sun-like than thought

Proxima Centauri may be more sun-like than thought

The nearby star Proxima Centauri hosts an Earth-sized planet (called Proxima b) in its habitable zone but the star seems nothing like our sun. It's a small, cool, red dwarf star only one-tenth as massive and one-thousandth as luminous as the sun. However, new research shows that it is sunlike in one surprising way: it has a regular cycle of starspots.

1 billion stars in 1,000 days

1 billion stars in 1,000 days

With one billion stars mapped in a thousand days, European researchers have shown that they are not afraid to tackle the most daunting tasks. The work was carried out by 450 researchers from 25 European countries, including around a hundred scientists from France, mainly at the CNRS, Observatoire de Paris and Observatoire de la Côte d’Azur[1], with major participation by the French space agency CNES.

NASA's Aqua satellite sees Super Typhoon Meranti approaching Taiwan, Philippines

NASA's Aqua satellite sees Super Typhoon Meranti approaching Taiwan, Philippines

NASA's Aqua satellite provided a visible image of Super Typhoon Meranti as it continued to move toward Taiwan and the northern Philippines.

The sharing economy's effect on business

The sharing economy's effect on business

Collaborative consumption is an expanding economic force in our country and globally, with consumers sharing everything from cars, bicycles and even agricultural equipment. It happens quickly and efficiently, with a simple click of a button or a swipe of a finger.

Many product-sharing transactions involve renters paying a fee to product owners through an online platform, reaping several inherent benefits to this consumer-to-consumer system: profits for the product owner; lower costs for the user; benefits to the environment.

New fabric uses sun and wind to power devices

New fabric uses sun and wind to power devices

Fabrics that can generate electricity from physical movement have been in the works for a few years. Now researchers at Georgia Institute of Technology have taken the next step, developing a fabric that can simultaneously harvest energy from both sunshine and motion.

Combining two types of electricity generation into one textile paves the way for developing garments that could provide their own source of energy to power devices such as smart phones or global positioning systems.

After a strong El Niño winter, NASA model sees return to normal

After a strong El Niño winter, NASA model sees return to normal

Not too hot, not too cold - instead, water temperatures in the equatorial Pacific Ocean should be just around normal for the rest of 2016, according to forecasts from the Global Modeling and Assimilation Office, or GMAO. With these neutral conditions, scientists with the modeling center at NASA's Goddard Space Flight Center say there is unlikely to be a La Niña event in late 2016.