At the extreme end of astrophysics, there are all sorts of phenomena that seem to be counter-intuitive. For example, how can an object not possibly get any brighter? For a long time, this limit, known as the Eddington limit, was thought to be an upper bound on how bright an object could be, and it was directly correlated with the mass of that object. But observations showed that some objects were even brighter than this theoretical limit, and now data collected by NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) confirms that these objects are, in fact, breaking the Eddington limit. But why?
Continue reading “Confirmed. Ultra-Luminous X-Ray Sources are Really That Bright”Black Holes Might be Defects in Spacetime
A team of theoretical physicists have discovered a strange structure in space-time that to an outside observer would look exactly like a black hole, but upon closer inspection would be anything but: they would be defects in the very fabric of the universe.
Continue reading “Black Holes Might be Defects in Spacetime”The Earth's Magnetosphere Could be Used as a Gravitational Wave Observatory
One of the challenges of gravitational wave astronomy is moving its abilities beyond observations of stellar mass mergers. The collision of two black holes or neutron stars releases a tremendous amount of gravitational energy, but even this is a challenge to detect. Gravitational waves do not couple strongly with most matter, so it takes a tremendous amount of sensitive observations to observe. But we are getting better at it, and there are a few proposals that hope to take our observations even further. One example of this is a recent study that looks at utilizing the magnetospheres of Earth and Jupiter.
Continue reading “The Earth's Magnetosphere Could be Used as a Gravitational Wave Observatory”New Photos Show Collapsed Chains of Craters on a Martian Volcano
Most everyone is familiar with Olympus Mons, the largest volcano on Mars and also the largest in the Solar System. But there are several other enormous shield volcanoes on Mars. The second largest is Ascraeus Mons, and new images from ESA’s Mars Express spacecraft reveal some interesting features on the side or flank of the mountain.
Continue reading “New Photos Show Collapsed Chains of Craters on a Martian Volcano”NASA Thinks They Can Give us 30 Minutes of Warning Before a Killer Solar Storm Hits Earth
We’ve touched on the hazards of solar storms plenty of times in the past. We’ve also recently started reporting even more stories involving some sort of AI, especially in the last few months since it has come back to the forefront of many discussions around technologies. So it should come as no surprise that a team at NASA has been busily applying AI models to solar storm data to develop an early warning system that they think could give the planet about 30 minutes notice before a potentially devastating solar storm hits a particular area.
Continue reading “NASA Thinks They Can Give us 30 Minutes of Warning Before a Killer Solar Storm Hits Earth”This Star Might be Orbiting a Strange “Boson Star”
A team of astronomers has claimed that observations of a sun-like star orbiting a small black hole might actually be the indication of something far more exotic – the existence of a boson star, a star composed entirely of dark matter.
Continue reading “This Star Might be Orbiting a Strange “Boson Star””Perseverance Finds an Ancient, Fast Flowing River
In a first for Martian water science, NASA’s Perseverance rover has discovered geological evidence of a large, fast-moving river in Mars’ ancient past. The high-energy river once emptied into Jezero crater, which the rover has been exploring since early 2021, and is a totally different water system than anything seen previously on the red planet.
Continue reading “Perseverance Finds an Ancient, Fast Flowing River”JWST Looks at the Atmosphere of a Stormy, Steamy Mini-Neptune
Just because there’s no Mini-Neptune in our Solar System doesn’t mean they’re not common. They appear to be widespread throughout the Milky Way, and according to NASA, are the most common exoplanet type. GJ 1214 b is one of them.
Continue reading “JWST Looks at the Atmosphere of a Stormy, Steamy Mini-Neptune”Glass Fibers in Lunar Regolith Could Help Build Structures on the Moon
Through the Artemis Program, NASA plans to send the first astronauts to the Moon in over fifty years. Before the decade is over, this program aims to establish the infrastructure that will allow for a “sustained program of lunar exploration and development.” The European Space Agency (ESA) also has big plans, which include the creation of a Moon Village that will serve as a spiritual successor to the International Space Station (ISS). China and Roscosmos also came together in June 2021 to announce that they would build the International Lunar Research Station (ILRS) around the lunar south pole.
In all cases, space agencies plan to harvest local resources to meet their construction and long-term needs – a process known as In-Situ Resource Utilization (ISRU). Based on samples returned by the fifth mission of the Chinese Lunar Exploration Program (Chang’e-5), a team of researchers from the Chinese Academy of Sciences (CAS) identified indigenous glass fibers for the first time. According to a paper they authored, these fibers were formed by past impacts in the region and could be an ideal building material for future lunar bases.
Continue reading “Glass Fibers in Lunar Regolith Could Help Build Structures on the Moon”New Images Reveal the Magnetic Fields in the Horsehead Nebula
Located near the summit of Maunakea, Hawaii, the 15-meter (~49 ft) James Clerk Maxwell Telescope (JCMT) at the East Asia Observatory (EAO) is the largest telescope in the world designed to operate exclusively in the submillimetre-wavelength. In 2018, Molokai’i High School alumna Mallory Go was awarded time with the JCMT under the Maunakea Scholars program. With the assistance of EAO astronomer Dr. Harriet Parsons, Go obtained unique images of the Horsehead Nebula in polarized light, which revealed the nebula’s magnetic fields.
Continue reading “New Images Reveal the Magnetic Fields in the Horsehead Nebula”