Physics & Astronomy News

<p>Some of the lasers and optics used in the ACME experiment. (Photo credit: Loic Anderegg)</p>
New study sets a size limit for undiscovered subatomic particles
A new study suggests that many theorized heavy particles, if they exist at all, do not have the properties needed to explain the predominance of matter over antimatter in the universe.
<p>Scientists from EPFL and ETH Zurich have developed an ultra-light glove – weighing less than 8 grams per finger– that enables users to feel and manipulate virtual objects. Their system provides extremely realistic haptic feedback and could run on a battery, allowing for unparalleled freedom of movement.</p>

<p>Image courtesy: EPFL</p>
Ultra-light gloves let users “touch” virtual objects
Scientists from EPFL and ETH Zurich have developed an ultra-light glove – weighing less than 8 grams per finger– that enables users to feel and manipulate virtual objects.

<p>Stars at the center of the Milky Way.</p>

<p>Credit: NASA, JPL-Caltech, Susan Stolovy (SSC/Caltech) et al.</p>
Researchers solve mystery at the centre of the Milky Way
Astronomers from Lund University in Sweden have now found the explanation to a recent mystery at the centre of the Milky Way galaxy: the high levels of scandium discovered last spring near the galaxy’s giant black hole were in fact an optical illusion.
<p>Schematic view of a bubble implosion, which is an envisioned picture showing the whole main events integrated, i.e., laser illumination, hot electron spread, implosion, and proton flash. (credit/ M. Murakami)</p>
Laser-driven Implosion
Scientists have discovered a novel particle acceleration mechanism called ‘micro-bubble implosion’

New Insights into Solar Flares
New insights into solar flares' explosive energy releases were released by the Owens Valley Solar Array (EOVSA)
Life and Death of a Neutron
Experiments that measure the lifetime of neutrons reveal a perplexing and unresolved discrepancy.
Looking for Signs Life on Mars
Scientists have created a tiny chemistry lab for a rover that will drill beneath the Martian surface looking for signs of past or present life.

Science Facts

How Fast is Mach 1?

by Anton Skorucak and

Mach 1: Fast planes and Ernst Mach: A Mach number is a common ratio unit of speed when one is talking about aircrafts. By definition, the Mach number is a ratio of the speed of a body (aircraft) to the speed of sound in the undisturbed medium through which the body is traveling.

It is said that the aircraft is flying at Mach 1 if its speed is equal to the speed of sound in air (which is 332 m/s or 1195 km/hr or 717 miles/hour.) An aircraft flying at Mach 2 is flying at twice the speed of sound in air, etc. Mach numbers are named after Ernst Mach (1838-1916), an Austrian philosopher and physicist. The term Mach number came into use in 1929.

A Map of the Sky

Niagara Falls, the Grand Canyon, Old Faithful... we know they're spectacular sites, but how did we find out about them? Early explorers took the time to map out the United States and as a result, you ...
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What Is Polarimetry?

Polarimetry is the technique of measuring the 'polarization' of light. Most of the light we encounter every day is a chaotic mixture of light waves vibrating in all directions. Such a combination is k ...
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24 GPS satellites orbit Earth.
Tick-Tock Atomic Clock

Modern navigators rely on atomic clocks. Instead of old-style springs or pendulums, the natural resonances of atoms -- usually cesium or rubidium -- provide the steady 'tick' of an atomic clock. The b ...
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Science Quote

'There must be no barriers for freedom of inquiry. There is no place for dogma in science. The scientist is free, and must be free to ask any question, to doubt any assertion, to seek for any evidence, to correct any errors.'

J. Robert Oppenheimer

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