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The latest Messages 41
2022-08-19 04:25:47
A NEW IMAGE FROM WEBB SHOWS GALAXY NGC 1365, KNOWN TO HAVE AN ACTIVELY FEEDING SUPERMASSIVE BLACK HOLE The James Webb Space Telescope continues to deliver stunning images of the Universe, demonstrating that the years of development and delays were well worth the wait! The latest comes from Judy Schmidt (aka. Geckzilla, SpaceGeck), an astrophotographer who processed an image taken by Webb of the barred spiral galaxy NGC 1365. Also known as the Great Barred Spiral Galaxy, NGC 1365 is a double-barred spiral galaxy consisting of a long bar and a smaller barred structure located about 56 million light-years away in the southern constellation Fornax.
Measuring over 200,000 light-years in diameter, roughly twice as large as the Milky Way, NGC 1365 is noted for the way its wide arms extend from its central bar to give it a Z-like appearance. The galaxy was selected for observations by JWST because of its iconic nature and how much of its interior structure is obscured by dust. In particular, its second bar is more prominent in infrared images, and previous instruments (like the Hubble and Spitzer space telescopes) have been limited in terms of what they could visualize.Source: UniverseToday
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@Physics | @Education
5.9K views01:25
2022-08-18 03:00:34
A collider is a type of particle accelerator which brings two opposing particle beams together such that the particles collide. Colliders may either be ring accelerators or linear accelerators.
Colliders are used as a research tool in particle physics by accelerating particles to very high kinetic energy and letting them impact other particles. Analysis of the byproducts of these collisions gives scientists good evidence of the structure of the subatomic world and the laws of nature governing it. These may become apparent only at high energies and for tiny periods of time, and therefore may be hard or impossible to study in other ways.━━━━━━━━━━━━
@Physics | @Education
5.9K views00:00
2022-06-24 05:08:35
The spectacle of a cheetah running at full speed is art; the anatomy and physique facilitating its speed and agility is genetic engineering at its best. The cheetah can accelerate from 0 – 60 mph in 3 seconds, making it the fastest land animal on the planet. Yes, even faster than Usain Bolt. Like Bolt, the cheetah is a sprinter – not a long distance runner – and can only attain high speeds in short bursts due to the tremendous drain on its energy resources. It could take up to 30 minutes for a cheetah to recover from a chase.
So just how can this big cat accelerate faster than a Ferrari? On the exterior, the cheetah is the most slender of the big cats; its lightweight body (weighing about 80-140 lbs.), small head and long legs are designed for aerodynamics. Structurally, the cheetah has a unique, flexible spine, which allows for extreme flexion and extension while running at top speeds. In spine flexion, when the cat’s legs are directly underneath its body, the scapula and hip are able to rotate to such an extreme angle that the cheetah’s front and hind legs overlap. To reach extension, the spine recoils like a spring propelling the cheetah’s legs out; it is this portion of the gait where the cheetah is able to reach strides up to 25 feet. Lastly, the cheetah is equipped with blunt, semi-retractable claws, which function similarly to soccer cleats. Since its claws never fully retract, like other big cats, they are always at-the-ready to provide powerful traction to the ground.
Credit: ThomsonSafaris
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@Physics | @Education
269 views02:08
2022-06-23 04:37:27
Loop quantum gravity (LQG) is a theory of quantum gravity, which aims to merge quantum mechanics and general relativity, incorporating matter of the Standard Model into the framework established for the pure quantum gravity case. It is an attempt to develop a quantum theory of gravity based directly on Einstein's geometric formulation rather than the treatment of gravity as a force. As a theory LQG postulates that the structure of space and time is composed of finite loops woven into an extremely fine fabric or network. These networks of loops are called spin networks. The evolution of a spin network, or spin foam, has a scale above the order of a Planck length, approximately 10⁻³⁵ meters, and smaller scales are meaningless. Consequently, not just matter, but space itself, prefers an atomic structure.━━━━━━━━━━━━
@Physics | @Education
340 views01:37
2022-06-22 04:29:12
When gymnasts spin, they are exploiting the physics concept of angular momentum. As they retract their arms and legs, their moment of inertia decreases, but their angular velocity increases to compensate, preserving their angular momentum.━━━━━━━━━━━━
@Physics | @Education
355 views01:29
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