Using the James Webb Space Telescope (JWST), astronomers have peered into the atmosphere of a cosmic body that could be a rogue planet or a “failed star.” Either way, the world wanders the cosmos without a parent. The cosmic orphan, or “free-floating planetary-mass object,” designated SIMP 0136 drifts through the universe around 20 light-years from … Read more
As the hunt for dark matter, the universe’s most common yet most mysterious “stuff,” continues, scientists are understandably eager to get the most powerful space telescope in on the action. Space.com spoke to three scientists, cosmic detectives who are hot on the trail of dark matter candidates using the James Webb Space Telescope (JWST). The … Read more
Astronomers have been forced to reassess the origins of mysterious, rapid radio wave blasts called “fast radio bursts” (FRBs). This rethink was brought about by an FRB first detected last year, which has been traced back to the “cosmic graveyard” of a massive “dead” galaxy filled with ancient stars located 2 billion light-years from Earth. … Read more
Using 16 years of data from NASA’s gamma-ray detecting Fermi spacecraft, astronomers have discovered that “microquasars,” systems in which a black hole is slowly devouring a star, may be small, but they pack one heck of a punch. Despite their diminutive nature, this research suggests even microquasars snacking on small stars can have an impressive … Read more
Dark energy, the mysterious force that’s driving the accelerating expansion of the universe, may not actually exist, scientists say. Their research has brought into question one of the cornerstones of modern cosmology. In a new study, published Dec. 19, 2024 in the journal Monthly Notices of the Royal Astronomical Society, the researchers analyzed data from … Read more
How do you cool down a phoenix? I don’t mean the mythological birds of flame and rebirth, but rather a cosmic namesake with a fittingly fiery nature. Using the James Webb Space Telescope (JWST), astronomers may finally have the answer. They used the powerful instrument to investigate the extreme cooling of gas in the Phoenix … Read more
Scientists have discovered a new way to probe the interiors of neutron stars by using gravitational waves to turn them into “cosmic tuning forks.” The reverberations of such ripples in spacetime could reveal the interiors of these extreme stellar remains. Born when massive stars die, neutron stars have up to two times the mass of … Read more
Superman isn’t the only one with X-ray vision. Plenty of exploding stars are also adept at blasting outbursts of this high-energy light. Now, thanks to a chance discovery, scientists are aware of an entirely new explosive stellar source of X-ray radiation. These outbursts’ light output didn’t resemble any previous cosmic explosion. Meet the “millinovas,” a … Read more
In our analysis of the expansion-induced hyperfine entanglement of the hydrogen atom, we use the standard Hamiltonian for the hyperfine structure of the ground-state atomic hydrogen. This involves introducing the electron spin operator \(\hat{S}\) and the proton spin operator \(\hat{I}\). Therefore, the effective Hamiltonian for the ground-state hyperfine structure can be expressed as \({H}_{HF}=A\hat{S}\cdot \hat{I}\). … Read more