Physics & Astronomy News

<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.
<p>How Gravity Can Bend Starlight</p>

<p>This illustration reveals how the gravity of a white dwarf star warps space and bends the light of a distant star behind it.</p>

<p>White dwarfs are the burned-out remnants of normal stars. The Hubble Space Telescope captured images of the dead star, called Stein 2051 B, as it passed in front of a background star. During the close alignment, Stein 2051 B deflected the starlight, which appeared offset by about 2 milliarcseconds from its actual position. This deviation is so small that it is equivalent to observing an ant crawl across the surface of a quarter from 1,500 miles away. From this measurement, astronomers calculated that the white dwarf's mass is roughly 68 percent of the sun's mass.</p>

<p>Stein 2051 B resides 17 light-years from Earth. The background star is about 5,000 light-years away. The white dwarf is named for its discoverer, Dutch Roman Catholic priest and astronomer Johan Stein.</p>
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.
Finding the 'Ghost Particles' Might be More Challenging
Results from the NEOS experiment on sterile neutrinos differ partly from the theoretical expectations.

Science Facts

What Happens at the Edge of a Black Hole?

by NASA Goddard Space Flight Center and

Most of the X-ray sources seen in this 12-day exposure by the Chandra X-ray Observatory are active galaxies and quasars powered by massive black holes. Ground-based observations show that many of them are shrouded by dust; many others remain unidentified, invisible except in X-rays.: Image Courtesy Chandra X-Ray Observatory The greatest extremes of gravity in the Universe today are the black holes formed at the centers of galaxies and by the collapse of stars. These invisible bodies can be studied by examining matter swirling into them, and by listening to the waves of distortion they make in spacetime. New data from X-ray satellites, such as NASA's Chandra X-ray Observatory and ESA's XMM-Newton, show signs of gas whizzing about black holes at close to the speed of light and hint that time is slowing as the gas plunges into the zone from which escape is impossible. Beyond Einstein missions will take a census of black holes in the Universe and give detailed pictures of what happens to space and time at the edges of these roiling vortices.

Beyond Einstein missions will listen to the sounds of spacetime carried by a new form of energy, predicted by Einstein, called gravitational waves. We will hear the booming, hissing, and humming of colliding and merging black holes and other extreme flows of matter throughout the Universe. These sounds will detail the conversion of matter and energy into warps in space and time. The measurements of gravitational waves will provide a new way of understanding the behavior of space and time near black holes and take us beyond to a new understanding of spacetime singularities.

Einstein himself never dreamed that it would be possible to detect these waves, which only vary the distance between objects as far apart as the Earth and Moon by less than the width of an atom. Yet the technology now exists to do so.

The Equivalence Principle

Four hundred years ago--or so the story goes--Galileo Galilei started dropping things off the Leaning Tower of Pisa: Cannon balls, musket balls, gold, silver and wood. He might have expected the heavi ...
continue reading this fact
Carbon dating the bones of an animal can pinpoint the time this animal died to within a few years.
Carbon Dating From The Skies

Determining the age of relatively recent fossils, those of plants and animals that lived tens of thousands of years ago, is not a guessing game but an exact science. By using carbon dating we can dete ...
continue reading this fact

The Sun’s Corona

The White-Light Corona - The Corona is the Sun's outer atmosphere. It is visible during total eclipses of the Sun as a pearly white crown surrounding the Sun. The corona displays a variety of features ...
continue reading this fact

Science Quote

'A scientist is happy, not in resting on his attainments but in the steady acquisition of fresh knowledge.'

Max Planck

All rights reserved. © Copyright '1995-'2017