Author: Jonathan Louise

Rainbows are full circles visible from high elevations; they form when sunlight passes through raindrops and refracts and reflects. Rainbows are a beautiful natural phenomenon that have captivated people for centuries. We often think of them as arches stretching across the sky, but in reality they are full circles. Rainbows are created when sunlight passes through raindrops at the right angle and refracts and reflects the light. This is why only part of the circle is visible to the observer on the ground, as the rest is blocked by the Earth’s surface. The amount of the halo that is visible…

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Explore universe with science news on discoveries, advancements. CNN’s Wonder Theory science newsletter offers a fascinating exploration of the universe. Last week, a team of researchers announced the earliest known evidence of sexual combat in the form of a trident-headed trilobite that scuttled the seafloor 400 million years ago. Trilobites were one of the earliest arthropods, and Walliserops was one of the species that stood out due to its trident-shaped protrusion. Researchers proposed various uses for these forking protrusions, including defense, hunting, and attracting mates. In a paper published in the scientific journal Proceedings of the National Academy of Sciences,…

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Korean Pathfinder Lunar Orbiter (KPLO) sends images of Earth and moon, aiding Artemis program. The Korean Pathfinder Lunar Orbiter (KPLO), also known as Danuri, is a joint project co-managed by the Korean Aerospace Research Institute (KARI) and NASA. Launched in August 2022, the spacecraft arrived in lunar orbit in mid-December and has since sent back a series of stunning images of the moon and Earth. The images include a time-lapse of the moon’s orbit around Earth, an image of Earth rising over the moon’s horizon, and a picture of the two celestial bodies on opposite sides of the sky. The…

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NASA, DARPA to test nuclear-powered spacecraft engine by 2027. NASA and the U.S. military’s research and development agency, DARPA, have announced plans to develop a nuclear thermal propulsion engine and launch it to space as soon as 2027. This engine would be far more efficient than traditional chemical-based rocket engines and could reduce the time astronauts would be exposed to deep-space radiation. The joint NASA-DARPA effort has a budget of $110 million for fiscal year 2023 and is expected to be hundreds of millions of dollars more through 2027. Nuclear thermal propulsion is a concept that has been studied for…

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Hall thrusters tested to increase thrust for interplanetary missions. Hall thrusters are an efficient type of electric propulsion widely used in orbit. A new study from the University of Michigan suggests that smaller Hall thrusters can generate much more thrust than previously thought, potentially making them a viable option for interplanetary missions. Benjamin Jorns, U-M associate professor of aerospace engineering, led the study which challenges the belief that a certain amount of current through a thruster area translates to how much thrust can be generated. The team tested a 9 kilowatt Hall thruster up to 45 kilowatts, maintaining roughly 80%…

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Asteroid 2023 BU to pass Earth safely, observed through telescope, Virtual Telescope Project livestream Jan. 26. Asteroid 2023 BU is set to make a close encounter with Earth this week, passing within 2,178 miles (3,506 km) of our planet’s surface. The asteroid was discovered on Saturday (Jan. 21) by astronomer Gennadiy Borisov at the MARGO Observatory in Crimea, and measures between 12 and 28 feet wide (3.8 to 8.5 meters). The Virtual Telescope Project will be streaming the asteroid’s pass on Thursday (Jan. 26) starting at 2:15 p.m. EST (1915 GMT), allowing anyone to watch the event. At magnitude 19.15,…

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Microbes capable of digesting plastic found in ocean, slowly breaking down 8 million tonnes of plastic annually; UV light and artificial seawater used in lab experiment; microplastics entering food webs, prevention better than clean-up. Plastic pollution is a growing global issue, with 8 million tonnes of synthetic polymers entering the ocean each year. While some sinks to the floor, returns to the shore, or collects in the middle of nowhere, a significant portion of plastic is unaccounted for. This mystery has led researchers to suspect that hungry microbes may be partly responsible. A recent study has confirmed that a species…

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Irreversible entanglement manipulation; entropy, energy, Carnot cycle; second law of thermodynamics; quantum systems; entanglement entropy. The second law of thermodynamics states that the amount of entropy of any closed system can never decrease. This law has been applied to macroscopic systems, but quantum systems are mostly studied in the microscopic regime. Scientists have uncovered a notion of ‘entanglement entropy’ that mimics the role of thermodynamical entropy, but it was unknown whether entanglement can always be reversibly manipulated. Researchers Ludovico Lami and Bartosz Regula have demonstrated that manipulation of entanglement is fundamentally irreversible, putting to rest any hopes of establishing a…

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NASA’s James Webb Space Telescope discovers coldest ices ever measured, crucial for life. The James Webb Space Telescope (JWST or Webb) is NASA’s most powerful space observatory yet. It has peered deep into a dense molecular cloud and found a rich variety of pristine interstellar ice, including a range of molecules crucial for life, at temperatures of minus 440 degrees Fahrenheit (minus 263 degrees Celsius). This is the coldest ices ever measured. The molecular cloud studied is called Chameleon I, located in the constellation of Chameleon, about 500 light-years away from Earth. It is one of the closest star-forming regions,…

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