When complete, the Square Kilometer Array (SKA) will be the largest radio telescope array in the entire world. The result of decades of work involving 40 institutions in 11 countries, the SKA will allow astronomers to monitor the sky in unprecedented detail and survey it much faster than with any system currently in existence.
Such a large array will naturally be responsible for gathering an unprecedented amount of data on a regular basis. To sort through all this data, the “brain” for this massive array will consist of two supercomputers. Recently, the SKA’s Science Data Processor (SDP) consortium concluded their engineering design work on one of these supercomputers.
Continue reading “A Supercomputer has been Designed to run the World’s Largest Radio Telescope”
At the University of California, Santa Barbara, researchers with the UCSB Experimental Cosmology Group (ECG) are currently working on ways to achieve the dream of interstellar flight. Under the leadership of Professor Philip Lubin, the group has dedicated a considerable amount of effort towards the creation of an interstellar mission consisting of directed-energy light sail and a wafer-scale spacecraft (WSS) “wafercraft“.
If all goes well, this spacecraft will be able to reach relativistic speeds (a portion of the speed of light) and make it to the nearest star system (Proxima Centauri) within our lifetimes. Recently, the ECG achieved a major milestone by successfully testing a prototype version of their wafercraft (aka. the “StarChip“). This consisted of sending the prototype via balloon into the stratosphere to test its functionality and performance.
Continue reading “Prototype of a Future Interstellar Probe was Just Tested on a Balloon”
Been following the Moon this week? The first sighting of the waxing crescent Moon this past weekend not only marked the start of the Muslim month of Ramadan worldwide, but also sets us up for an interesting Friday night encounter, as the waxing crescent Moon crosses the Beehive Cluster.
Continue reading “Watch the Moon Buzz the Beehive”
For about a century now, scientists have theorized that the metals in our Universe are the result of stellar nucleosynthesis. This theory states that after the first stars formed, heat and pressure in their interiors led to the creation of heavier elements like silicon and iron. These elements not only enriched future generations of stars (“metallicity”), but also provided the material from which the planets formed.
More recent work has suggested that some of the heaviest elements could actually be the result of binary stars merging. In fact, a recent study by two astrophysicists found that a collision which took place between two neutron stars billions of years ago produced a considerable amount of some of Earth’s heaviest elements. These include gold, platinum and uranium, which then became part of the material from which Earth formed.
Continue reading “Some of Earth’s Gold Came From Two Neutron Stars That Collided Billions of Years Ago”
When planning for long-duration crewed missions, one of the most important things is to make sure that the crews have enough of the bare essentials to last. This is no easy task, since a crewed spacecraft will be a crew’s entire world for months on end. That means that a sufficient amount of food, water and oxygen will need to be brought along.
According to a new investigation being conducted aboard the International Space Station, a possible solution could lie with a hybrid life support system (LSS). In such a system, which could be used aboard spacecraft and space stations in the near future, microalgae would be used to clean the air and water, and possibly even manufacture food for the crew.
Continue reading “Astronauts Could Rely on Algae as the Perfect Life Support Partner”
Right now, the Japanese Aerospace Exploration Agency‘s (JAXA)
Hayabusa2 spacecraft is busy exploring the asteroid 162173 Ryugu. Like it’s predecessor, this consists of a sample-return mission, where regolith from the asteroid’s surface will be brought back home for analysis. In addition to telling us more about the early Solar System, these studies are expected to shed light on the origin of Earth’s water (and maybe even life).
Meanwhile, scientists here at home have been busy examining the samples returned from 25143 Itokawa by the Hayabusa1 spacecraft. Thanks to a recent study by a pair of cosmochemists from Arizona State University (ASU), it is now known that this asteroid contained abundant amounts of water. From this, the team estimates that up to half the water on Earth could have come from asteroid and comet impacts billions of years ago.
Continue reading “Hayabusa1’s Samples of Itokawa Turned up Water That’s Very Similar to Earth’s Oceans”
Among Elon Musk’s many plans for the future, one of the more ambitious has been the creation of a constellation of satellites that will offer broadband internet access to the entire world. Known as “Starlink”, the company’s long-term plan is to deploy over 12,000 internet satellites to Low Earth Orbit (LEO) by the mid-2020s.
Despite criticism and dismissal, Musk and SpaceX have taken some major steps in recent years to get the ball rolling on this proposal. And according to a recently-released official statement from the company, mass production is well underway and the first batch of operational satellites are already in Florida awaiting their scheduled May 2019 launch.
Continue reading “Starlink’s Satellites Will be Orbiting at a Much Lower Altitude, Reducing the Risks of Space Junk”
Even after almost three decades of faithful service, the Hubble Space Telescope continues to operate and provide breathtaking images of the cosmos. As one of NASA’s Great Observatories, its observations of distant galaxies, exoplanets, and the expansion of the Universe have had a revolutionary impact on astronomy, astrophysics and cosmology.
Hubble’s latest contribution comes in the form of a deep-sky mosaic image that was constructed using 16 years’ worth of observations. Known as the “Hubble Legacy Field“, this mosaic is being described as the largest and most comprehensive “history book” of galaxies. All told, it contains roughly 265,000 galaxies that date back to just 500 million years after the Big Bang.
Continue reading “16 Years of Hubble Images Come Together in this one Picture Containing 265,000 Galaxies”
Since the late 19th century, scientists have struggled to explain the origin of the Moon. While scientists have long-theorized that it and the Earth have a common origin, the questions of how and when has proven to be elusive. For instance, the general consensus today is that an impact with a Mars-sized object (Theia) led to the formation of the Earth-Moon System shortly after the formation of the planets (aka. the Giant Impact Hypothesis).
However, simulations of this impact have shown that the Moon would have formed out of material primarily from the impacting object. This is not borne out by the evidence, though, which shows that the Moon is composed of the same material Earth is. Luckily, a new study by a team of scientists from Japan and the US has offered an explanation for the discrepancy: the collision took place when Earth was still composed of hot magma.
Continue reading “When the Impact that Created the Moon Happened, the early Earth was still a ball of magma”
Since the 1960s, scientists have theorized that the Universe is filled with a mysterious, invisible mass. Known as “dark matter“, this mass is estimated to make up roughly 85% of the matter in the Universe and a quarter of its energy density. While this mass has been indirectly observed and studied, all attempts at determining its true nature have so far failed.
To address this, multiple experiments are being carried out that rely on immensely sophisticated instruments. One of these, called XENON, recently observed a process that had previously avoided multiple attempts at detection. These results could help scientists to improve their understanding of neutrinos, which some scientists believe is what dark matter is made up of.
Continue reading “Dark Matter Detector Finds the Rarest Event Ever Seen in the Universe”