News That Matters

Tag: Jupiter&#039s

Plumes of ocean spray are emanating from Jupiter's moon Europa

Plumes of ocean spray are emanating from Jupiter's moon Europa

Science
May 14 (UPI) -- New research offers additional evidence of plumes emanating from Europa's subsurface ocean. Images captured by the Hubble Telescope have previously suggested the presence of ocean plumes ejected through tissues in the icy crust of Jupiter's moon. Some astronomers were skeptical of the Hubble results, however. The newest proof was discovered among data collected by the Galileo mission in 1997 during a Europa flyby. Scientists detailed the new proof in a paper published Monday in the journal Nature Astronomy. Scientists with the Cassini mission were able to identify water plumes protruding from Saturn's moon Enceladus by measuring perturbations in the magnetic fields surrounding the satellite. Molecules and atoms ejected in a watery plume quickly become ionized as solar win...
Study explains why Jupiter's jet stream reverses course on a predictable schedule

Study explains why Jupiter's jet stream reverses course on a predictable schedule

Science
Dec. 19 (UPI) -- Scientists can finally explain why Jupiter's jet stream regularly reverses course -- like clockwork. The revelation could help scientists better understand similar equatorial jet stream oscillations found on Earth and Saturn.The latest research -- published this week in the Journal of Geophysical Research-Planets -- reveals that gravity waves are the primary driver of the reversal of Jupiter's equatorial jet stream.Researchers first discovered Earth's equatorial jet stream after watching ash from the 1883 eruption of the Krakatoa volcano being blown from east-to-west. Hot air balloons later confirmed the stratospheric current.The jet stream begins in the lower stratosphere and moves toward the upper troposphere, the lowest level of Earth's atmosphere. The current regularly...
Analysis of Jupiter's auroras presents new mystery

Analysis of Jupiter's auroras presents new mystery

Science
Sept. 6 (UPI) -- A new analysis of Jupiter's auroras, the most powerful in the solar system, has revealed a fresh mystery."At Jupiter, the brightest auroras are caused by some kind of turbulent acceleration process that we do not understand very well," Barry Mauk, a researcher in the Applied Physics Laboratory at Johns Hopkins University, said in a news release.Measurements of Jupiter's auroras using particle detectors and ultraviolet spectrographs revealed extremely large electric potentials. When electric potentials on Jupiter's poles align with the gas giant's magnetic field, electrons stream through the upper atmosphere at at energies upwards of 400,000 electron volts.On Earth, large electric potentials are linked with the most intense auroras. Currents of a few thousand volts are asso...