News That Matters

Tag: theory

New Horizons spacecraft ‘alters theory of planet formation’

New Horizons spacecraft ‘alters theory of planet formation’

Science
Scientists say they have "decisively" overturned the prevailing theory for how planets in our Solar System formed.The established view is that material violently crashed together to form ever larger clumps until they became worlds.New results suggest the process was less catastrophic - with matter gently clumping together instead.The study appears in Science journal and has been presented at the American Association for the Advancement of Science meeting in Seattle.The study's lead researcher, Dr Alan Stern, said that the discovery was of "stupendous magnitude". "There was the prevailing theory from the late 1960s of violent collisions and a more recent emerging theory o...
Drone users must now register and complete theory test

Drone users must now register and complete theory test

Technology
Drone owners will have to register their device, complete an online theory test and pay a one-off £9 fee under new regulations that take effect across the UK from today.Anyone owning a drone that weighs more than 250g (8.8oz) will be legally required to register it and could face a £1,000 fine if they fail to do so and are caught flying it. The legislation is aimed at tackling drone misuse and the rising number of incidents that aviation authorities have had to deal with in recent years. There were 125 incidents last year and 87 reported so far in 2019.In a statement, the Civil Aviation Authority (CAA) said: "UK drone laws are changing and it's vital that drone users - whether they fly regularly or not - are aware of how the drone registration scheme will affect them."
Study casts doubt on important climate theory

Study casts doubt on important climate theory

Science
Sept. 23 (UPI) -- Until the release of greenhouse gases during the 20th century sent Earth's temperatures climbing, the planet was enjoying a 15-million-year-long period of cooling. What triggered that cooling has remained a matter of debate, but new research suggests one of the most popular theories is incomplete. Though temperatures have been rising over the last several decades as result of human-caused global warming, Earth's climate is cooler than it was 15 million years ago. The most agreed upon explanation for Earth's long-term cooling is enhanced rock weathering. Some 15 million years ago, the Indian and Asian continents collided, causing the formation of the Himalayas. The uplifting of Himalayas brought new rocks to the surface, enhancing rock weathering. Chemical processes invo...
Researchers question Einstein’s theory of relativity, but it holds up

Researchers question Einstein’s theory of relativity, but it holds up

Science
July 26 (UPI) -- It's been more than a century since Albert Einstein published his theory of relativity. And while new research shows that it remains intact, they also say new questions have arisen. A comprehensive test identified a relativistic redshift from light emitted from a star circling the Sagittarius A* black hole in the middle of the Milky Way, according to a study published Thursday in Science. "Einstein's right, at least for now," Andrea Ghez, who runs the Galactic Center Group at UCLA and study co-lead author, said in a news release. "We can absolutely rule out Newton's law of gravity. Our observations are consistent with Einstein's theory of general relativity. However, his theory is definitely showing vulnerability. It cannot fully explain gravity inside a black hole, and ...
Chang’e-4: Chinese rover ‘confirms’ Moon crater theory

Chang’e-4: Chinese rover ‘confirms’ Moon crater theory

Science
The Chinese Chang'e-4 rover may have confirmed a longstanding idea about the origin of a vast crater on the Moon's far side.The rover's landing site lies within a vast impact depression created by an asteroid strike billions of years ago.Now, mission scientists have found evidence that impact was so powerful it punched through the Moon's crust and into the layer below called the mantle.Chang'e-4 has identified what appear to be mantle rocks on the surface.It's something the rover was sent to the far side to find out.Chunlai Li, from the Chinese Academy of Sciences in Beijing, and colleagues have presented their findings in the journal Nature.The lunar far side, which is turned away from Earth, is more rugged than the familiar nea...