TON 618 is often cited, but the central supermassive black hole of the Phoenix Cluster (Phoenix A) is potentially the most massive black hole in the observable universe. Scientists use a unit of measurement called a Solar Mass to compare the mass of the black hole with our sun. A Solar Mass is approximately equivalent to the mass of our Sun. The models of the scale of the supermassive black hole in the center of the Phoenix Cluster suggested by the scientists paper indicate an estimated mass on the order of 100 billion Solar Masses. That’s 24,100 times the mass of the black hole at the center of the Milky Way (Sagittarius A*). This supermassive black hole has a size of approximately 2,000 astronomical units (1 AU = The distance between the Sun and Earth). That’s a size comparable to 50 times the distance from the Sun to Pluto (or if placed where the Sun is it could reach the inner limit of the Oort Cloud). That would make it have a circumference that would take 71 days and 14 hours to travel at light speed (c = 299,792,458 meters per second).
Archaeopteryx is an extinct genus of bird-like dinosaurs. Even though they were small, with broad wings, and had an inferred ability to fly or glide, they had more features in common with other small Mesozoic dinosaurs than with modern birds. Archaeopteryx shared dinosaur features such as jaws, sharp teeth, three fingers with claws, a long bony tail, hyperextensible second toes (killing claw), and feathers (among other features). Archaeopteryx is considered an intermediate between our modern day birds and predatory dinosaurs like Deinonychus. In other words, if you’ve ever wondered where birds came from, the Archaeopteryx fossils provide evidence. Archaeopteryx is one of the most famous transitional fossils and gives evidence for the evolution of birds from theropod dinosaurs. Birds are dinosaurs!
The fastest-spinning neutron star known is PSR J1748−2446ad, rotating at a rate of 716 times per second or 42,960 revolutions per minute, it’s equator is spinning at approximately 24% of the speed of light, or over 70,000 km per second. As the star got compressed into a much smaller and denser star its rotation speed increased, just like a figure skater, this is called the conservation of angular momentum. Most neutron stars are observed as pulsars. Scientists have also shown we can use pulsars as a positional guide for spaceships.
Our Milky Way galaxy is estimated to contain between 100–400 billion stars. A detailed study observed over six years by the Probing Lensing Anomalies NETwork (PLANET) collaboration found that the Milky Way galaxy contains a minimum of 100 billion planets. According to the study there is one planet for every star on average.
Black hole time dilation is when the closer an object is to a black hole, the slower time passes relative to someone far away. This effect can also be seen to a much lesser degree on Earth. Physicists at NIST have tested this effect using clocks separated at different altitudes and proved the effect is real even at small scales. Black holes are much more extreme, if one astronaut spent one hour near the black hole, the other astronaut that watched from further away may experience years passing by.
Near a black hole by https://pixabay.com/users/lisovtsew123-20149271/?utm_source=link-attribution&utm_medium=referral&utm_campaign=image&utm_content=5981947
