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NASA’s main workhorse for deep-space observation has faced a new technical issue this week that has forced scientists to pull it into “safe mode”. The safe mode is designed to keep the Hubble Space Telescope, which has revealed several mysteries of outer space, stable and allow scientists to work on it to address whatever problem it is encountering in functioning normally. In a tweet, the space agency said the telescope has experienced “synchronisation issues” with internal spacecraft communications. This is the latest in a string of challenges the three-decade-old telescope has faced recently.

“Hubble’s science instruments went into safe mode on Monday after experiencing synchronization issues with internal spacecraft communications,” NASA tweeted.

Hubble is a joint project by NASA and the European Space Agency (ESA). It was launched in 1990 and has so far made over 1.3 million observations. A few months ago, the space observatory experienced a technical issue after which all astronomical viewing was halted for a month. The Hubble returned to action a month later following a remote repair job by NASA scientists.

These glitches are not an exception to the Hubble but their frequency has increased over the years. NASA hopes Hubble will continue to serve for some more years but it is readying the more powerful, next-generation James Webb Space Telescope for a December launch, says a report in CNET. The report added that when the telescope is in safe mode, it remains stable and powered through its solar panels even as the team tries to fix the technical problem.

Still, Hubble has been one of the largest and most versatile research tools available to astronomers currently. The telescope has captured some remarkable moments in the Universe.

Recently, NASA shared a stunning image of an outer space region where newborn stars are taking shape. The image was splattered with hues of red and yellow and twinkling stars dotted the region —estimated to be about 13,000 light-years from Earth — like diamonds.

In April, to celebrate the 31st anniversary of the launching of the Hubble Space Telescope, NASA shared an image of a luminous blue star, AG Carinae. The star is about 20,000 light-years away from the Earth. The star, which began forming about 10,000 years ago, is likely to survive only a few years.


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NASA’s X-59 Supersonic Jet Is Almost Ready for First Flight

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NASA's X-59 Supersonic Jet Is Almost Ready for First Flight

NASA’s experimental X-59 Quiet SuperSonic Technology (Quesst) aircraft has reached a crucial testing milestone with its engine fired up for the first time. Since late October, engineers at Lockheed Martin’s Skunk Works facility in Palmdale, California, have been carrying out phased engine tests to evaluate the X-59’s performance and systems integration. These tests mark a significant step toward the aircraft’s initial flight, though an official date for this event has not been determined.

Engine Tests and Performance Evaluations

Engine tests began with low-speed operations, allowing engineers to inspect for leaks and verify that key systems, such as hydraulics and electrical components, function smoothly with the engine running. Once basic checks were complete, the X-59’s engine was powered up in full for an initial assessment. Jay Brandon, NASA’s X-59 chief engineer, explained that the tests served as a “warmup” to ensure the engine performed correctly and supported various critical aircraft systems.

The jet operates with a modified F414-GE-100 engine, a version of the F414 series used in the U.S. Navy’s Boeing F/A-18 Super Hornet. To predict the sound levels the X-59 might produce, NASA has used F/A-18 jets to simulate the aircraft’s unique sound profile, which is quieter than conventional sonic booms.

Design Features and Goals

The X-59 is designed to reach Mach 1.4, with a target altitude of 55,000 feet. Its long, streamlined nose — extending over 11 meters — is crafted to reduce sonic booms to a mild “thump” sound, instead of the disruptive noise traditionally associated with supersonic travel. With its shape, the X-59 could support regulatory shifts allowing quieter supersonic flights over populated areas.

In January 2024, NASA unveiled the X-59’s revolutionary cockpit design, which lacks a forward-facing window. To compensate, pilots rely on an “eXternal Vision System” that provides a forward view via a digital display, combining camera feeds with augmented reality. Pam Melroy, NASA Deputy Administrator, highlighted this technology as a means to overcome limitations in visibility due to the aircraft’s design.

Next Steps and Community Research

Upcoming testing phases will examine the aircraft’s responses to different simulated scenarios and include taxi tests to ensure smooth ground operation. Once airborne, the X-59 will fly over select U.S. cities to gauge public response to its quieter sound profile. Data gathered will support NASA’s goal of demonstrating viable, noise-minimised supersonic flight for potential future commercial applications.

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This Dinosaur’s Armour Might Have Withstood a High-Speed Car Crash

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This Dinosaur's Armour Might Have Withstood a High-Speed Car Crash

A study has shown that the well-preserved fossil of a nodosaur, a plant-eating dinosaur, could withstand the force of a high-speed car crash. The fossil, discovered in Alberta, Canada, belongs to Borealopelta markmitchelli , a species that lived around 110 million years ago during the Early Cretaceous period. This fossil is one of the best-preserved dinosaur specimens ever found, offering unprecedented insights into the defensive capabilities of the nodosaur’s armour.

Study Insights from Expert Researchers

The research, led by biomechanical paleontologist Dr. Michael Habib from UCLA, revealed that the keratin sheaths covering the nodosaur’s bony spikes were significantly thicker than originally thought. The thickness of the keratin layer on the fossil was measured at nearly 16 centimetres in some areas, much thicker than the keratin found in modern-day animals like cattle horns. This keratin, combined with bony spikes, provided an exceptionally strong defence.

According to Dr. Habib, the strength of the nodosaur’s armour was such that it could withstand over 125,000 joules of energy per square metre—equivalent to the force from a high-speed car collision. The research highlighted that this armour was a defence against predators but it also likely played a role in combat between males of the same species.

Adaptations for Flexibility and Protection

The study further suggested that the nodosaur’s armour, consisting of a flexible keratin layer, allowed for greater mobility and protection. If the keratin was damaged, it could be shed, offering a quick recovery mechanism compared to brittle bone armour that could crack under impact. The presence of keratin would also have allowed the dinosaur to fight effectively with its rivals, which could have been crucial in mating battles.

The fossil’s remarkable preservation has led to further insights into the armour of other dinosaur species, with researchers suggesting that similar adaptations might have been widespread among armoured dinosaurs.

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Meteoroid Trails Could Help Detect Comets Years in Advance

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Meteoroid Trails Could Help Detect Comets Years in Advance

New research has revealed that meteoroid trails, left behind by long-period comets, could help scientists detect potentially hazardous comets years before they approach Earth. These rare comets, which take hundreds or even thousands of years to complete their orbits, often go unnoticed until it is too late to prepare for a possible collision. However, scientists have now found a way to track these comets by observing the meteoroid streams they leave in their wake.

Tracking Comet Paths Through Meteoroid Trails

The study has been accepted for publication in The Planetary Science Journal, and is available as a preprint via arXiv. Long-period comets (LPCs) are known for their infrequent visits to the solar system. While comets like Halley’s Comet pass by Earth every 76 years, other comets only make an appearance once every few centuries. Some of these distant comets could pose a significant threat if their orbits bring them close enough to Earth. A comet with a large enough impact could release massive amounts of energy, potentially equivalent to hundreds of thousands of megatons of TNT.

By studying meteor showers, which are caused by the debris from these comets, researchers believe they can track the paths of these hazardous comets. Samantha Hemmelgarn, a graduate student at Northern Arizona University and lead author of the study, explained that meteoroid streams from long-period comets are less affected by planetary gravitational forces. This makes it easier to predict the orbits of the parent comets.

New Method Could Provide Years of Warning Time

The study used existing data from 17 meteor showers with known comet parents. By simulating comet streams and comparing them with known comet paths, researchers were able to predict where to look for these long-period comets. The results suggest that such methods could give scientists years of advanced warning before a comet poses a serious threat to Earth.

While this technique is not foolproof and has limitations, it is a step forward in planetary defence. The upcoming Legacy Survey of Space and Time (LSST), using the Vera C. Rubin Observatory, is expected to detect these long-period comets well in advance, allowing for better preparedness.

Challenges and Future Prospects

Despite its potential, the method cannot detect comets with orbital periods longer than 4,000 years, as their meteoroid streams would be too sparse to detect. However, this new approach could greatly improve early detection of more imminent threats, offering humanity a better chance to prepare for a possible comet impact.

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