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Archive for the ‘space’ category: Page 620

Oct 24, 2019

How Fast Is The Universe Expanding? Incompatible Answers Point To New Physics

Posted by in categories: physics, space

As more data comes in, the puzzle gets deeper and deeper.

Oct 24, 2019

NASA Innovator Experiments with Force Fields for Moving Matter

Posted by in categories: particle physics, space

On a metal workbench covered with tools, instruments, cords, and bottles of solution, Aaron Yevick is using laser light to create a force field with which to move particles of matter.

Yevick is an optical engineer who came to NASA’s Goddard Space Flight Center in Greenbelt, Maryland, full-time earlier this year. Despite being in his current position with NASA less than a year, Yevick received funding from the Goddard Fellows Innovation Challenge (GFIC) — a research and development program focused on supporting riskier, less mature technologies — to advance his work.

His goal is to fly the technology aboard the International Space Station, where astronauts could experiment with it in microgravity. Eventually, he believes the technology could help researchers explore other planets, moons, and comets by helping them collect and study samples.

Oct 23, 2019

First identification of a heavy element born from neutron star collision

Posted by in categories: physics, space

For the first time, a freshly made heavy element, strontium, has been detected in space, in the aftermath of a merger of two neutron stars. This finding was observed by ESO’s X-shooter spectrograph on the Very Large Telescope (VLT) and is published today in Nature. The detection confirms that the heavier elements in the Universe can form in neutron star mergers, providing a missing piece of the puzzle of chemical element formation.

In 2017, following the detection of gravitational waves passing the Earth, ESO pointed its telescopes in Chile, including the VLT, to the source: a star merger named GW170817. Astronomers suspected that, if did form in neutron star collisions, signatures of those elements could be detected in kilonovae, the explosive aftermaths of these mergers. This is what a team of European researchers has now done, using data from the X-shooter instrument on ESO’s VLT.

Following the GW170817 merger, ESO’s fleet of telescopes began monitoring the emerging kilonova explosion over a wide range of wavelengths. X-shooter in particular took a series of spectra from the ultraviolet to the near infrared. Initial analysis of these spectra suggested the presence of heavy elements in the kilonova, but astronomers could not pinpoint individual elements until now.

Oct 23, 2019

As We Search for a New Home, Robots Have Conquered Space

Posted by in categories: biological, habitats, robotics/AI, space

Space — also commonly known as the final frontier — has left us in a state of awe since we ever first laid eyes on it. Inspired by numerous works of science fiction, we’ve made it a mission of ours to not only explore space but to colonize its planets as we continue searching for a secondary home.

And while our efforts have been mildly successful thus far, a group of non-biological “creatures” have already achieved the difficult task of conquering space. They’re known as robots.

Whether on the International Space Station (ISS) or on another planet, these automated machines have extended our reach into the cosmos far better than any actual human hand has accomplished. It all started in 1969 when the Soviets made the first attempt to land a robotic rover, known as Lunokhod 0, onto the Lunar surface of our Moon. Unfortunately for the Soviets, the rover was unsuccessful in its landing; instead crashing down after a failed start.

Oct 23, 2019

ISRO Releases Chandrayaan-2’s First Illuminated Image of the Lunar Surface

Posted by in category: space

ISRO on Thursday released the first image of the surface of the moon captured by the Imaging Infrared Spectrometer (IIRS) payload on-board Chandrayaan-2.

Oct 23, 2019

Air-breathing engine precooler achieves record-breaking Mach 5 performance

Posted by in categories: engineering, space

UK company Reaction Engines has tested its innovative precooler at airflow temperature conditions equivalent to Mach 5, or five times the speed of sound. This achievement marks a significant milestone in its ESA-supported development of the air-breathing SABRE engine, paving the way for a revolution in space access and hypersonic flight.

The precooler heat exchanger is an essential SABRE element that cools the hot airstream generated by air entering the engine intake at hypersonic speed.

“This is not only an excellent achievement in its own right but one important step closer to demonstrating the feasibility of the entire SABRE engine concept,” said Mark Ford, heading ESA’s Propulsion Engineering section.

Oct 21, 2019

China Reveals Wind Tunnel Tests Of Space Plane-Launching High-Speed Mothership Aircraft

Posted by in categories: space, transportation

Such a system would give China the ability to rapidly and unpredictably access space with a reusable orbiter.

Oct 21, 2019

Gravity crystals: A new method for exploring the physics of white dwarf stars

Posted by in categories: food, particle physics, space

Grab a mixing bowl from your kitchen, throw in a handful of aluminum balls, apply some high voltage, and watch an elegant dance unfold where particles re-arrange themselves into a distinct “crystal” pattern. This curious behavior belongs to the phenomenon known as Wigner crystallization, where particles with the same electrical charge repel one another to form an ordered structure.

Wigner crystallization has been observed in variety of systems, ranging from particulates the size of sand grains suspended in small clouds of electrons and ions (called a dusty plasma) to the dense interiors of planet-sized , known as white dwarfs. Professor Alex Bataller of North Carolina State University has recently discovered that Wigner crystallization inside can be studied in the lab using a new class of classical systems, called gravity crystals.

For the curious behavior of Wigner crystallization to occur, there must be a system composed of charged particles that are both free to move about (plasma), that strongly interact with each other (strongly coupled particles), and has the presence of a confining force to keep the plasma particles from repulsively exploding away from each other.

Oct 20, 2019

Virgin Galactic Unveils Under Armour Spacesuits and ‘Spacewear’ for Space Tourist Flights

Posted by in categories: space, transportation

Virgin Galactic lifted the curtain Wednesday (Oct 16) on its new line of Under Amour “spacewear” for passengers on suborbital trips aboard its SpaceShipTwo vehicles.

Oct 19, 2019

The universe might be full of Earth-like exoplanets, study suggests

Posted by in categories: chemistry, space

Earth-like exoplanets may be quite common in the universe, a new UCLA study suggests.

Scientists led by Alexandra Doyle, a University of California, Los Angeles (UCLA) graduate student of geochemistry and astrochemistry, came up with a new method to analyze the geochemistry of planets outside our solar system for the study, which was published in the journal Science this week.

“We have just raised the probability that many rocky planets are like the Earth and there’s a very large number of rocky planets in the universe,” co-author Edward Young, UCLA professor of geochemistry and cosmochemistry, said in a statement.