Physics & Astronomy News

<p>A drawing illustrates the unusual topological landscape around a pair of features known as exceptional points (red dots), showing the emergence of a Fermi arc (pink line at center), and exotic polarization contours that form a Mobius-strip-like texture (top and bottom strips).</p>

<p>Courtesy: MIT</p>
New exotic phenomena seen in photonic crystals
Researchers observe, for the first time, topological effects unique to an 'open' system.
<p>ESA Astronauts training in terrestrial lava tubes in Lanzarote during the PANGEA 2016 course. Credit: ESA/L. Ricci</p>
Lava Tubes: Human Habitats on the Moon and Mars?
Lava tubes, underground caves created by volcanic activity, could provide protected habitats large enough to house streets on Mars or even towns on the Moon.

<p>PR Image heic1715a</p>

<p>The binary asteroid 288P (artist’s impression)</p>
Hubble Discovers a Unique Type of Object in the Solar System
Astronomers have observed the intriguing characteristics of an unusual type of object in the asteroid belt between Mars and Jupiter.
<p>Professor Kyoung Jin Choi (left) and Yeon Soo Jung (right) are examining a wearable TEG. As shown right, the output voltage of the W-STEG attached to clothes was measured to be 52.3 mV.</p>
Wearable Solar Thermoelectric Generator
UNIST has introduced a new advanced energy harvesting system, capable of generating electricity by simply being attached to clothes, windows, and outer walls of a building.

Observation confirms Einsteins general theory of relativity.
Astronomers have used NASA Hubble Space Telescope to repeat a century-old test of Einsteins general theory of relativity
Gravitational Wave Kicks Monster Black Hole Out of Galactic Core
Astronomers have uncovered a supermassive black hole that has been propelled out of the center of a distant galaxy by what could be the awesome power of gravitational waves.
Milky Way-like Galaxies in Early Universe Embedded in 'Super Halos'
By harnessing the extreme sensitivity of the Atacama Large Millimeter/submillimeter Array (ALMA), astronomers have directly observed a pair of Milky Way-like galaxies seen when the universe was only eight percent of its current age.

Science Facts

Neutron Stars

by Chandra X-Ray Observatory Center and

Chandra image of the Vela Pulsar.: Image Courtesy NASA/PSU/G.Pavlov et al Ordinary matter, or the stuff we and everything around us is made of, consists largely of empty space. Even a rock is mostly empty space. This is because matter is made of atoms. An atom is a cloud of electrons orbiting around a nucleus composed of protons and neutrons. The nucleus contains more than 99.9 percent of the mass of an atom, yet it has a diameter of only 1/100,000 that of the electron cloud. The electrons themselves take up little space, but the pattern of their orbit defines the size of the atom, which is therefore 99.9999999999999% open space!

What we perceive as painfully solid when we bump against a rock is really a hurly-burly of electrons moving through empty space so fast that we can't see-or feel-the emptiness. What would matter look like if it weren't empty, if we could crush the electron cloud down to the size of the nucleus? Suppose we could generate a force strong enough to crush all the emptiness out of a rock roughly the size of a football stadium. The rock would be squeezed down to the size of a grain of sand and would still weigh 4 million tons!

Such extreme forces occur in nature when the central part of a massive star collapses to form a neutron star. The atoms are crushed completely, and the electrons are jammed inside the protons to form a star composed almost entirely of neutrons. The result is a tiny star that is like a gigantic nucleus and has no empty space. Neutron stars are strange and fascinating objects. They represent an extreme state of matter that physicists are eager to know more about. Yet, even if you could visit one, you would be well-advised to turn down the offer.

The largest known volcano in the solar system, Olympus Mons.
Mount Olympus

Olympus Mons, the largest volcano in the solar system, towers a breathtaking 25 km above the surrounding plains on Mars. Until recently scientists thought that Olympus Mons and other volcanoes on the ...
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An artist
Not Quite A Planet

Astronomers have dubbed it 'Quaoar' (pronounced kwa-whar) after a Native American god. It lies a billion kilometers beyond Pluto and moves around the Sun every 288 years in a near-perfect circle. Unti ...
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A force may be thought of as a push or pull in a specific direction. When a force is applied to an object, the object accelerates in the direction of the force according to Newton's laws of motion. Th ...
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