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The position of the North Star will change over time Navigation will be weird when Polaris stops being the North Star in about 13,000 years. In case you didn't know, Earth's axis goes through a motion called "precession" which means that the planet's axis will change, and trace out the shape of a cone--even if it's slightly. When this occurs, it takes around 26,000 years for the axis to trace out a complete cone shape. To add to this, Polaris, the Earth's current "North Star" will eventually begin to shift positions as the Earth undergoes precession. In 3,000 B.C., it's believed that the North Star was the star Thuban, otherwise known as Alpha Draconis. In about 13,000 years, the star Vega will be the new North Star -- but in 26,000 years, Polaris will return in its original position as the Earth continues to go through precession.

~If two pieces of the same type of metal touch in space, they will bond and be permanently stuck together. This amazing effect is called cold welding. It happens because the atoms of the individual pieces of metal have no way of knowing that they are different pieces of metal, so the lumps join together. This wouldn't happen on Earth because there is air and water separating the pieces. The effect has a lot of implication for spacecraft construction and the future of metal-based construction in vacuums.

Neutron stars can spin at a rate of 600 rotations per second Neutron stars are one of the possible evolutionary end-points of high mass stars. They're born in a core-collapse supernova star explosion and subsequently rotate extremely rapidly as a consequence of their physics. Neutron stars can rotate up to 60 times per second after born. Under special circumstances, this rate can increase to more than 600 times per second.

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Would you take male contraceptive pill if it was readily available ?

Scientists detected Earendel with the help of a huge galaxy cluster, WHL0137-08, sitting between Earth and the newfound star. The gravitational pull of this enormous galaxy cluster warped the fabric of space and time, resulting in a powerful natural magnifying glass that greatly amplified the light from distant objects behind the galaxy, such as Earendel. This gravitational lensing has distorted the light from the galaxy hosting Earendel into a long crescent the researchers named the Sunrise Arc. The rare way in which Earendel aligned with WHL0137-08 meant that the star appeared directly on, or extremely close to, a curve in spacetime that provided maximum brightening, causing Earendel to stand out from the general glow of its home galaxy. This effect is analogous to the rippled surface of a swimming pool creating patterns of bright light on the bottom of the pool on a sunny day—the ripples on the surface act as lenses and focus sunlight to maximum brightness on the pool floor.

The photon sphere is a spherical region in space where photons are forced to travel in an orbit at r=3GM/c2 Photon Sphere is a region of around a black hole where photons travel in orbits around the singularity, just beyond the event horizon. 🙂

Happy birthday 🎉🎉🥳 Sir Albert Einstein

Surely the w,orld War will be so devastated we'll atleast close collapse to stone age

Was everything planned/simulated? 🤔😳 Comment your views!...

is it possible for a black hole to DEVOUR an entire galaxy🤯⁉️