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

Don't Make Waves

by Gene Mascoli and

Swimmer: Image Copyright © 2002 Cislunar Aerospace, Inc. Fast and slow swimming pools? What are they? A given pool's walls and other components may create and reflect waves making it more difficult (slow) for athletes to swim. A fast pool minimizes wave interference with the athletes making it easier (fast) for the athletes to swim.

There are different types of waves which move matter differently. When you toss a small stone into a body of water, waves are formed from the point the stone hit the water. The waves form a circular pattern around this entry point and spread farther and farther apart in a single wave pattern. When you look at these waves, you can see the crests (high points) and troughs (low points). Only a few crests and troughs are created. But when you drop 2 or 3 stones into the water at the same time, you have more waves and these waves interact with one another.

Imagine 8 lanes of Olympic swimmers! Each swimmer's motion generates a series of waves. These waves can move across the lanes and interact with one another and against the athletes in different directions, making it more difficult to swim and slowing down the athletes' times. Have you ever had to walk into the wind? It's more difficult than on a calm day. Similarly, swimming into waves is more difficult than swimming in calm water. The water in fast Olympic pools 'spills over' the walls of the pools. This minimizes wave reflection and interference.

An artist
Large Asteroid Zooms Safely Past Earth

A mountain-sized asteroid made its closest approach to Earth at 9:35 a.m. Eastern Time on Wednesday, Sept. 29, 2004. Although asteroid 4179 Toutatis came no closer than four times the distance between ...
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Image of the Keck observatory with a laser shining. Image of the planet Neptune without and with the adaptive optics correction.
Laser Guide Stars

Did you ever wonder why we have to have the Hubble Space Telescope so high up in the Earth's orbit? Why not just make a bigger and better telescope on the surface? ...
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Microbes In Space

There are creatures that were living on the Space Station before the first astronauts went inside. Astronauts found a few living on the Moon. Scientists believe they could even live on Mars. These cre ...
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Science Quote

'One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery every day.'

Albert Einstein

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