To combat the issue of space debris, Australia’s EOS Space and Japan’s EX-Fusion will develop a laser system to remove it from Earth’s orbit.
EX-Fusion, a startup based in Osaka, is attempting to remove tiny pieces of space debris by firing laser beams from the ground.
Consciousness is one of the most mysterious and fascinating aspects of human existence. It is also one of the most challenging to study scientifically, as it involves subjective experiences that are not directly observable or measurable. David Chalmers, a professor of philosophy and neural science at NYU mentions in his book The Conscious Mind.
“It may be the largest outstanding obstacle in our quest for a scientific understanding of the universe.”
The real questions are: how can we approach the problem of consciousness from a rigorous and objective perspective? Is there a way to quantify and model the phenomena of awareness, feelings, thoughts, and selfhood? There is no definitive answer to this question, but some researchers have attempted to use mathematical tools and methods to study these phenomena. Self-awareness, for instance, is the ability to perceive and understand the things that make you who you are as an individual, such as your personality, actions, values, beliefs, and even thoughts. Some studies have used the mirror test to assess the development of self-awareness in infants and animals.
When Rosemary Brown identified a strange particle decay 75 years ago, it set events in motion that would rewrite the laws of physics.
Scientists have discovered a massive ring-shaped structure in space that challenges our understanding of the universe.
The cosmic megastructure, dubbed the Big Ring, has a diameter of about 1.3 billion light-years and is among the largest structures ever observed. It appears to be roughly the size of 15 moons in the night sky as seen from Earth.
The Big Ring is so large that it challenges the cosmological principle. This fundamental cosmological assumption says that the universe is homogeneous on a large scale and looks the same in all directions.
Astronomers have recently discovered the most massive neutron star to date, nearly at the theoretical limit for such stars. But it’s only about the size of a small city.
But by analyzing data taken from the Sloan Digital Sky Survey, which studies galaxies illuminated by powerful quasars bursts, the researchers teased apart the evidence for a ring far bigger than the theoretical upper size limit — a stunning coil-like structure aligned face-on with Earth.
“The Big Ring and Giant Arc are the same distance from us, near the constellation of Boötes the Herdsman, meaning they existed at the same cosmic time when the universe was only half of its present age,” Lopez said. “They are also in the same region of sky, at only 12 degrees apart when observing the night sky … [This] raises the possibility that together they form an even more extraordinary cosmological system.”
Although the cause of the gigantic structure is unclear, the researchers first speculated that it could be a remnant of a baryon acoustic oscillation (BAO), a type of sound wave that rippled through the hot plasma of the early universe. Yet further analysis found that the Big Ring was too large and, due to its corkscrew shape, not spherical like BAOs. Alternative explanations suggest that it could possibly be a cosmic string, a hypothetical clumping of matter created in the early universe, or a remnant of something else that could demand an entirely new model to explain it.
Now, astronomers led by Northwestern University have pinpointed the extraordinary object’s birthplace — and it’s rather curious, indeed.
Using images from NASA ’s Hubble Space Telescope, the researchers traced the FRB back to not one galaxy but a group of at least seven galaxies. The galaxies in the collection appear to be interacting with one another — perhaps even on the path to a potential merger. Such groups of galaxies are rare and possibly led to conditions that triggered the FRB.
The unexpected finding might challenge scientific models of how FRBs are produced and what produces them.
For every proton, there were over a billion others that annihilated away with an antimatter counterpart. So where did all that energy go?
Astronomers have completed the largest and most detailed study of what triggers stars to form in the universe’s biggest galaxies, using NASA’s Chandra X-ray Observatory and other telescopes. They were surprised to find that the conditions for stellar conception in these exceptionally massive galaxies have not changed over the last ten billion years.
“What’s surprising here is that there are lots of things that could have affected star formation over the last ten billion years,” said Michael Calzadilla of the Massachusetts Institute of Technology (MIT) who led the study. “In the end, however, the main driver of star formation in these huge galaxies really comes down to one thing—whether or not the hot gas surrounding them can cool off quickly enough.”
Clusters of galaxies are the largest objects in the universe held together by gravity and contain huge amounts of hot gas seen in X-rays. The mass of this hot gas is several times the total mass of all the stars in all the hundreds of galaxies typically found in galaxy clusters.
While NASA has long been known for its space-related initiatives, the space agency also has a rich history of aeronautics research and development with high-speed aircraft. This makes today’s unveiling of the experimental X-59 quiet supersonic aircraft, a joint venture between NASA and defense contractor, Lockheed Martin, much more exciting. With the X-59, NASA hopes to collect data with the goal of revolutionizing commercial air travel, as the most well-known supersonic passenger aircraft was the Concorde, which retired in 2003.
“This is a major accomplishment made possible only through the hard work and ingenuity from NASA and the entire X-59 team,” said NASA Deputy Administrator Pam Melroy. “In just a few short years we’ve gone from an ambitious concept to reality. NASA’s X-59 will help change the way we travel, bringing us closer together in much less time.”
The X-59 aircraft is the centerpiece of NASA’s Quesst mission and stands for “Quiet Supersonic Technology”. The goal of Quesst is to develop supersonic aircraft that don’t produce the familiar sonic booms that supersonic aircraft are known to make when they break the sound barrier, which has been known to result in broken windows and significant noise pollution for civilian populations.
