Category Astronomy/Space

This is a composite image of Uranus by Voyager 2 and two different observations made by the Hubble Space Telescope — one for the ring and one for the auroras. Credit: ESA/Hubble & NASA, L. Lamy/Observatoire de Paris

Unlike Earth, this icy planet’s magnetosphere opens and closes every day. More than 30 years after Voyager 2 sped past Uranus, Georgia Institute of Technology researchers are using the spacecraft’s data to learn more about the icy planet. Their new study suggests that Uranus’ magnetosphere, the region defined by the planet’s magnetic field and the material trapped inside it, gets flipped on and off like a light switch every day as it rotates along with the planet...

The Pancam on NASA’s Mars Exploration Rover Opportunity took the component images of this enhanced-color scene during the mission’s “walkabout” survey of an area just above the top of “Perseverance Valley,” in preparation for driving down the valley. Credit: NASA/JPL-Caltech/Cornell/Arizona State Univ.

NASA’s senior Mars rover, Opportunity, is examining rocks at the edge of Endeavour Crater for signs that they may have been either transported by a flood or eroded in place by wind. Those scenarios are among the possible explanations rover-team scientists are considering for features seen just outside the crater rim’s crest above “Perseverance Valley,” which is carved into the inner slope of the rim.

The team plans to drive Opportunity down Perseverance Valley after completing a “walkabout”...

M.J. Owens, M. Lockwood and L.A. Barnard (2017). ‘Coronal mass ejections are not coherent magnetohydrodynamic structures’. Nature Scientific Reports. Doi: 10.1038/s41598-017-04546-3

Long-term power cuts, destruction of electronic devices and increased cancer risk for aeroplane passengers are all potential effects of the Earth being hit by a powerful solar eruption. Yet, new research has found space scientists have their work cut out to predict when these coronal mass ejections (CMEs) are on a collision course with Earth.

A study of CMEs by scientists at the University of Reading has found they have cloud-like structures...

NASA-funded CHESS mission will check out the space between stars Floating clouds of the interstellar medium are the focus of the NASA-funded CHESS sounding rocket mission, which will check out the earliest stages of star formation. Here, the CHESS payload is integrated with the sounding rocket before launch. Credit: Kevin France

Deep in space between distant stars, space is not empty. Instead, there drifts vast clouds of neutral atoms and molecules, as well as charged plasma particles called the interstellar medium—that may, over millions of years, evolve into new stars and even planets. These floating interstellar reservoirs are the focus of the NASA-funded CHESS sounding rocket mission, which will check out the earliest stages of star formation.

CHESS—short for the Colorado High-resolu...