Physics & Astronomy News

<p>This artist’s impression shows an imagined view from the surface one of the three planets orbiting an ultracool dwarf star just 40 light-years from Earth that were discovered using the TRAPPIST telescope at ESO’s La Silla Observatory. These worlds have sizes and temperatures similar to those of Venus and Earth and are the best targets found so far for the search for life outside the Solar System. They are the first planets ever discovered around such a tiny and dim star.</p>

<p>In this view one of the inner planets is seen in transit across the disc of its tiny and dim parent star.</p>

<p>Credit: ESO/M. Kornmesser</p>
Three Potentially Habitable Worlds Found
Astronomers have discovered three potentially habitable planets orbiting an ultracool dwarf star just 40 light-years from Earth.
<p>Artist's conception of Planet Nine.</p>

<p>Caltech/R. Hurt (IPAC)</p>
Planet Nine: A World That Shouldn't Exist
Researchers examines a number of scenarios for Planet Nine existence and find that most of them have low probabilities.

<p>Expanding polymer-coated gold nanoparticles</p>

<p>Credit: Yi Ju/University of Cambridge NanoPhotonics</p>
Little ANTs
Researchers have built a nano-engine that could form the basis for future applications in nano-robotics, including robots small enough to enter living cells.
<p>Artist’s impression depicting a compact object – either a black hole or a neutron star – feeding on gas from a companion star in a binary system.</p>

<p>Credit: ESA - C. Carreau</p>
Winds at 0.25c spotted leaving mysterious binary systems
Astronomers have observed two black holes in nearby galaxies devouring their companion stars at an extremely high rate, and spitting out matter at a quarter the speed of light.

Dark matter does not contain certain axion-like particles
Researches are getting closer to corner light dark-matter particle models. Observations can rule out some axion-like particles in the quest for the content of dark matter.
The Universe, where space - time becomes discrete
It time continuous or discrete? Scientists propose a non-local union of relativity and quantum mechanics.
New state of water molecule discovered
Researchers have discovered a new state of water molecule using neutron scattering & computational modeling.

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.

Bright scars on a darker surface testify to a long history of impacts on Jupiter
The Strange Spires of Callisto

When NASA's adventurous Galileo spacecraft skimmed a mere 138 km, (123 miles) above the surface of Jupiter's moon Callisto, onboard cameras captured the sharpest pictures ever of that moon's mysteriou ...
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Introduction To Jupiter

With its numerous moons and several rings, the Jupiter system is a 'mini-solar system.' Jupiter is the most massive planet in our solar system, and in composition it resembles a small star. In fact, i ...
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Near-Earth Supernovas

Supernovas near Earth are rare today, but during the Pliocene era of Australopithecus supernovas happened more often. Their source was an interstellar cloud called 'Sco-Cen' that was slowly gliding by ...
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Science Quote

'Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.'

Albert Einstein

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