Super Blue Moon of August 2024: Know All About This Rare Event
Super Blue Moon, a rare astronomical event, occurred on August 19. The much anticipated event was seen in the night sky after almost a year, as the previous Blue Moon was seen on August 30, 2023. But what exactly does that mean? Despite the exciting name, the Moon is not blue, and the change in its size is usually subtle. Understanding the definitions behind these terms can help set the right expectations for this unique event, even if it isn’t as visually spectacular as it might sound.
What Is a Supermoon?
A supermoon happens when the full Moon coincides with its closest approach to Earth in its elliptical orbit, known as perigee. When the Moon is at or near this closest point, it appears slightly larger and brighter in the sky. However, the size difference is usually subtle, with the Moon appearing up to 14 percent larger at perigee than at its farthest point, apogee. This difference might be hard to notice unless you’re carefully observing the night sky.
What Is a Blue Moon?
A blue moon is either the second full moon in a single month or the third full moon in a season that has four. The August 19 blue moon is of the seasonal variety. Despite its name, the Moon does not appear blue unless specific atmospheric conditions are in place, such as smoke or dust scattering light in a way that makes the Moon take on a bluish hue. This is a rare occurrence and not something to expect during this event.
Do Supermoons And Blue Moons Always Occur Together?
No, they do not. While supermoons happen several times a year, blue moons are less frequent. The combination of a supermoon and a blue moon is rare, with occurrences spaced about ten years apart on average. The next super blue moon won’t occur until 2037, making this a special opportunity for skywatchers.
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In a groundbreaking experiment, gold has defied the expectations that it was still solid even after being heated above the standard temperature. With the help of rapid laser bursts, the scientists could superheat gold beyond the entropy catastrophe, which is a theoretical boundary at which solids need to melt due to extreme heat. To the surprise, the gold was in the structure temporarily, and then it led to the rethinking of how matter behaves when provided with intense conditions. Such a rare phenomenon is known as superheating, where the heating happens so fast that atoms don’t get enough time to reorganise themselves into a liquid.
Gold Withstands the Entropy Catastrophe: What Is Superheating?
As per Science Alert, the atomic structure of gold resisted melting and absorbed the heat quickly, even faster than the response of its atoms. Scientists performed this study at 19,000 Kelvin, and gold remained solid for 2 picoseconds, which is enough to challenge the theory of physics.
Conventionally, the physicist believed that solids could not survive heat more than three times their melting point. This experiment, although pushed gold to 14 times the threshold, with the help of advanced techniques, which involved X-ray reflections to track the heat absorption accurately. The findings suggest that the materials can resist melting beyond the previously known boundaries; however, only for brief moments, which are difficult to even imagine.
Could Other Solids Resist Melting Like Gold? What This Means for Future Research
The results found by the scientists don’t change the law of thermodynamics. However, they suggest that such laws cannot be completely applied in ultra-fast reactions, and atoms cannot move or rearrange in this much time. Most importantly, gold had no place to go, and this let it remain solid even after heating to unexpected temperatures.
This unlocks the new possibilities fr understanding the extreme situations, from the impact of asteroids to the nuclear reactors. Scientists now wonder if other solids could also show the same tolerance, and rule out the current model of melting points, which need to be known altogether. Science must revisit the question asked by one scientist that how hot can you make something before melting?
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Astronomers have found a vast, never-before-noticed reservoir of stellar material, hundreds of light-years across, lurking in a cold, dark, starless swath of our galaxy. It’s dubbed the Midpoint Cloud and was identified using the Green Bank Telescope; it appears to channel dense clouds of material into the heart of our galaxy. It harbours active regions filled with dense dust lanes and star formation possibilities. These lanes could be bringing twisted matter into the galaxy’s central bar, shaping how stars form in this extreme environment and offering a rare snapshot of the first stages of a galaxy’s evolution.
Newly Found Midpoint Cloud May Be Key to Star Formation in the Milky Way’s Core
As per the study, researchers at the National Radio Astronomy Observatory and Green Bank Observatory confirmed the size and shape of the GMC based on mass, density, and movement. The gassy chaos in the cloud mirrors the caustic turmoil at the galactic centre, yielding measurements from a faint object that says something about an energetic event 200 light-years distant. That could be a link from the field-like tranquillity of our own Milky Way’s disk to the mayhem of its core.
Perhaps analogously to gas channels, a thick dust lane in the Midpoint cloud could supply the central stellar bar fragment with fresh gas, again supporting an interpretation that star formation is inhibited in this region by the strong gravitational potential. But regions like the Midpoint could collect such thick gas, spurring the birth of new stars.
The team classified Knot E as a compact gas clump whose material has been eroded by both star radiation and a maser, or microwave emission, within a cloud. A shell-like feature suggests earlier supernova explosions, like those the deaths of massive stars in the region might have initiated.
The Midpoint cloud Larry Morgan, of the Green Bank Observatory, discovered is a valuable clue in our knowledge of how galaxies evolve and form stars near their centers. The finding could give scientists a way to learn how matter flows inward across the cosmos, one hidden cloud at a time.
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