Circa 1997
By Michio Kaku
IS THERE a Final Theory in physics? Will we one day have a complete theory that will explain everything from subatomic particles, atoms and supernovae to the big bang? Einstein spent the last 30 years of his life in a fruitless quest for the fabled unified field theory. His approach has since been written off as futile.
The correspondence between fermions and bosons of identical mass that is postulated to have existed during the opening moments of the big bang and that relates gravity to the other forces of nature… See the full definition.
It’s a cosmic collision that has astronomers rethinking one of the universe’s most colossal events: the collision of massive stars.
In a new paper published in the journal Monthly Notices of the Royal Astronomical Society, astronomers reveal the finding of a kilonova produced by the collision of two massive stellar objects called neutron stars. The collision is roughly 1,000 times brighter than the death of a massive star called a supernova. And they say it produced several hundred planets’ worth of gold and platinum.
But astronomers almost missed it.
There’s a crisis brewing in the cosmos. Measurements over the past few years of the distances and velocities of faraway galaxies don’t agree with the increasingly controversial “standard model” of the cosmos that has prevailed for the past two decades. Astronomers think that a 9 percent discrepancy in the value of a long-sought number called the Hubble Constant, which describes how fast the universe is expanding, might be revealing something new and astounding about the universe.
The cosmos has been expanding for 13.8 billion years and its present rate of expansion, known as the Hubble constant, gives the time elapsed since the Big Bang. However, the two best methods used to measure the Hubble constant do not agree, suggesting our understanding of the structure and history of the universe – called the ‘standard cosmological model’ – may be wrong.
There was, writes Dennis Overbye in New York Times Science, a disturbance in the Force: “Long, long ago, when the universe was only about 100,000 years old — a buzzing, expanding mass of particles and radiation — a strange new energy field switched on. That energy suffused space with a kind of cosmic antigravity, delivering a not-so-gentle boost to the expansion of the universe.
This European Southern Observatory animation was created to celebrate the opening of the new ESO Supernova Planetarium in Germany. It begins from the home of the new facility in Garching and zooms our to the “End of the Universe”, according to the ESO.
Music: inspiring adventure cinematic background by maryna.
Twenty years ago, NASA’s orbiting Chandra X-ray Observatory beamed back its stunning “First Light” image of Cassiopeia A – but it’s still been checking back in every now and then.
Here’s how the supernova remnant has shifted and flowed in the two decades since go.nasa.gov/30AaeLr
Black holes are some of the most powerful and fascinating phenomena in our Universe, but due to their tendency to swallow up anything nearby, getting up close to them for some detailed analysis isn’t possible right now.
Instead, scientists have put forward a proposal for how we might be able to model these massive, complex objects in the lab — using holograms.
While experiments haven’t yet been carried out, the researchers have put forward a theoretical framework for a black hole hologram that would allow us to test some of the more mysterious and elusive properties of black holes — specifically what happens to the laws of physics beyond its event horizon.
Ummmn o.o!
How are black holes born? Astrophysicists have theories, but we don’t actually know for certain. It could be massive stars quietly imploding with a floompf, or perhaps black holes are born in the explosions of colossal supernovas. New observations now indicate it might indeed be the latter.
In fact, the research suggests that those explosions are so powerful, they can kick the black holes across the galaxy at speeds greater than 70 kilometres per second (43 miles per second).
Continue reading “Millions of High-Speed Black Holes Could Be Zooming Around The Milky Way” »
A black hole is a region of spacetime exhibiting gravitational acceleration so strong that nothing can escape, not even light. These cosmic phenomena are said to form when massive stars collapse at the end of their life cycle. Then, they can continue to grow by absorbing mass from their surroundings, engulfing stars in their path and merging with other black holes.
Wow. The Chandra X-ray Observatory just celebrated its 20th anniversary of being launched into space! It roared into orbit on board the Space Shuttle Columbia on July 23, 1999.
Continue reading “Watch the expansion of the Cas A supernova remnant with your own eyes!” »
