On April 8, Tropical Cyclone Harold is a major hurricane, a Category 4 on the Saffir-Simpson Hurricane Wind Scale, as it exits Fiji and heads toward the island of Tonga. NASA used satellite data to calculate the rainfall generated by this powerful and destructive storm in the Southern Pacific Ocean.
The Belle II experiment started about one year ago. Physical Review Letters has now published the initial results of the detector. The work deals with a new particle in the context of dark matter, which accounts for about 25 percent of the universe.
An international research team led by the Department of Physics and Astronomy at the University of Turku, Finland, mapped the interstellar magnetic field structure and interstellar matter distribution in the solar neighbourhood. The results of the study have been published in the esteemed European journal Astronomy & Astrophysics (A&A) in March, 2020.
No matter where we look, the same rules apply everywhere in space: countless calculations of astrophysics are based on this basic principle. A recent study by the Universities of Bonn and Harvard, however, has thrown this principle into question. Should the measured values be confirmed, this would toss many assumptions about the properties of the universe overboard. The results are published in the journal Astronomy & Astrophysics, but are already available online.
The existence of a magnetic field beyond 3.5 billion years ago is still up for debate.
Tropical Cyclone Harold brought heavy rains and hurricane-force winds to Vanuatu and was moving toward Fiji when NASA-NOAA's Suomi NPP satellite provided forecasters with an image of the storm.
Clemson University researchers and their international colleagues have reported the first detection of a relativistic on-axis jet emerging from two colliding galaxies -- the first photographic proof that merging galaxies can produce jets of fast-moving charged particles. Scientists had previously discovered that jets could be found in elliptical-shaped galaxies, which can be formed in the merging of two spiral galaxies. Now, they have an image showing the formation of a jet from two younger, spiral-shaped galaxies.
In its final moments of life, a distant massive star releases an intense burst of high-energy gamma radiation - a Gamma Ray Burst (GRB) - the brightest sources of energy in the universe, detectable to humans through powerful telescopes. Scientists have long been divided over what powers these extraordinary explosions. Now research from the University of Bath suggests a dying star's collapsing magnetic field may hold the answers.
New analysis of data from NASA's Cassini spacecraft found that electric currents, triggered by interactions between solar winds and charged particles from Saturn's moons, spark the auroras and heat the planet's upper atmosphere.
One of NASA's satellites that can measure the rate in which rainfall is occurring in storms passed over powerful Tropical Cyclone Harold just after it made landfall in Vanuatu in the Southern Pacific Ocean.