Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published in the journal Icarus, this extra world might have triggered a violent planetary shuffling billions of years ago that could have disrupted some of Jupiter’s and Uranus’s moons and possibly led to the formation of others.
The focus of this NASA/ESA Hubble Space Telescope image is an active spiral galaxy on a journey lasting hundreds of millions of years. The galaxy Messier 88 (M88), also known as NGC 4501, is located about 63 million light-years away in the constellation Coma Berenices (Berenice’s Hair).
Astronomers may have discovered one of the clearest examples yet of a rare “pair-instability” supernova. It is a catastrophic explosion thought to completely destroy some of the most massive stars in the universe, leaving behind no remnant. The paper outlining the properties of this rare explosion was posted to the arXiv preprint server on May 15.
Supermassive black holes are the largest known black holes in the universe, sitting at the center of most large galaxies. They are sometimes described as cosmic monsters because they feed on surrounding gas and dust when they are active, as well as destroy anything that gets too close. But their reputation could be due for a rethink, as a new paper published on the arXiv preprint server suggests they may also be the birthplace of millions of planets.
Astronomers using the James Webb Space Telescope (JWST) have discovered a stellar bar in GN20, a massive galaxy seen just 1.5 billion years after the Big Bang. The new paper was submitted to the preprint server arXiv on May 14.
Reports of an explosion from people across New England on Saturday afternoon sent police agencies and others scrambling to understand what caused a double boom that shook buildings in Massachusetts and Rhode Island.
A new race to the moon is emerging between the United States and China. Unlike fifty years ago, the goal is no longer just about landing and leaving, but establishing a base that allows for a sustainable presence and extended stays on the surface of our natural satellite. The objective is now to use the moon as a testing ground for technologies that will enable us to travel further, particularly to Mars.
Around the world, people watched NASA’s Artemis II mission in awe as humans returned to lunar orbit for the first time since 1972.
Astronomers from the George Washington University (GWU) in Washington, DC, and elsewhere have employed NASA’s Chandra X-ray spacecraft to observe a pulsar wind nebula inside a supernova remnant known as CTA 1. Results of the observational campaign, presented in a research paper published May 20 on the arXiv preprint server, shed more light on the morphology and properties of this nebula.
Cosmic rays seen at Earth show a wide range of particle energies, from 107 electron-volts (eV) to more than 1020 eV, the latter being about the same as the kinetic energy of a 450 gram football (soccer ball) being kicked across the pitch at about 8 meters per second. A plot of cosmic ray energies from the Milky Way galaxy often shows a fair amount of what scientists might call “structure”—interesting deviations from the underlying trend called “knees” and “ankles” that indicate new processes or methods of cosmic ray production taking place at that energy.
Space exploration is filled with setbacks, but the spectacular explosion of Blue Origin’s New Glenn rocket on Thursday night marked a significant blow to not only the company, which was founded by billionaire Jeff Bezos, but also NASA, with the two collaborating for the upcoming US moon missions.
University of Calgary researchers are a part of a group who just got one step closer to solving a mystery of the universe. Dr. Timothy Friesen, Ph.D., an associate professor of Physics and Astronomy in the Faculty of Science, and his team led a new measurement comparing the spectrum of hydrogen to its antimatter counterpart—antihydrogen.
Past research has indicated Mars’s largest northern basin, Utopia Planitia, was once the location of a large body of water, but details surrounding when this body of water may have existed have not been resolved. Researchers have now identified a ring of minerals in the region that have helped them string together a timeline of what happened there. The new study, published in Nature Communications, provides details about the ocean’s timeline and what it says about life on Mars.
Which comes first, the galaxy or the black hole? We don’t know, but scientists have long thought it could be the galaxy: Large stars within an existing galaxy consume their fuel and collapse to form black holes, which can gobble up surrounding material and merge over time to form more massive entities.
How ambitious should you be? Folk wisdom offers conflicting advice: “Shoot for the moon,” but also, “Don’t let the perfect be the enemy of the good.” A new study by researchers at the University of Wyoming, Stanford University and the University of Colorado-Boulder used a mathematical model to show that ambition lies in the middle—above average but finite.
Astronomers may have uncovered a hidden supermassive black hole inside the famous Antennae galaxies NGC 4038/4039, a pair of colliding galaxies best known for their spectacular bursts of star formation. The paper outlining the findings was posted to the arXiv preprint server on May 21.
With peak wildfire season approaching, scientists with NASA’s FireSense project have created low-cost thermal sensors to install on fire bulldozers that will alert firefighters when heat from a nearby fire reaches a dangerous level. The sensors also provide researchers with important data on what happens beneath the canopy during a fire.
A study covering 76 countries has found that people who are more trusting, patient, altruistic and cooperative tend to report higher levels of happiness and life satisfaction, suggesting that well-being depends on more than material prosperity alone. The work was published in the International Journal of Happiness and Development.
This NASA Hubble Space Telescope image features the dwarf irregular galaxy ESO 490-017, roughly 12,000 light-years in diameter and some 23 million light-years away in the constellation Canis Major. The galaxy’s low surface brightness makes it appear as a faint, starry swarm behind brighter foreground stars that are easily recognized by their diffraction spikes. Numerous red, orange, and beige dots are distant galaxies peppering the black background, many exhibiting distinct spiral structure.
Researchers have developed a novel virtual model for simulating how astronauts in future moon base operations might interact with each other and with their environment, with preliminary simulations revealing potential opportunities to boost the chances of a successful mission. Raymond Vera and colleagues at George Mason University in Virginia, U.S., present these findings in PLOS One.
