An image taken by the Curiosity Rover MastCam instrument shows layered sedimentary rocks composing Mount Sharp. The rover has been driving from the floor of Gale crater up through the rocks within these hills in order to understand how the rocks change from lower in the section (older) to higher […]

Brown dwarfs, such as the one seen in this illustration, are actually orange or red, and they glow brightest in the infrared part of the spectrum. PHOTOGRAPH: NASA/JPL-CALTECH/2MASS The brown dwarf isn’t a star and it’s not a planet. But it’s illuminating the murky borderlands that separate the two. DAN CASELDEN […]

Credit: ESA/Roscosmos/CaSSIS, CC BY-SA 3.0 IGO This image was taken on March 22, 2021, in the Lunae Planum region [16.74°N, 300.9°E] of Mars by the CaSSIS camera on the ESA-Roscosmos ExoMars Trace Gas Orbiter (TGO). This region is known to be covered by large lava deposits probably from the nearby Tharsis Montes […]

Artist’s impression of the internal structure of Mars. Credit: © IPGP / David Ducros The first direct seismic observations from NASA’s InSight lander, presented in three studies in this issue, provide clues to the composition of Mars. Researchers across these studies report preliminary findings from the Insight mission and begin to map […]

Jupiter is shown in visible light for context underneath an artistic impression of the Jovian upper atmosphere’s infrared glow. The brightness of this upper atmosphere layer corresponds to temperatures, from hot to cold, in this order: white, yellow, bright red and lastly, dark red. The aurorae are the hottest regions […]

Illustration of gas-giant planet COCONUTS-2b. Credit: B. Bays (SOEST/UH) Astronomers have discovered thousands of exoplanets — planets beyond our solar system — but few have been directly imaged, because they are extremely difficult to see with existing telescopes. A University of Hawaiʻi Institute for Astronomy (IfA) graduate student has beaten […]

ILLUSTRATION: NICOLAS SARTER/IPGP InSight and Perseverance have sent back unprecedented data on everything from marsquakes to the Red Planet’s inner layers. WHILE HUMANS HAVE been struggling to control the Covid-19 pandemic, baking in record heat, and trying to figure out how not to run out of water, our spacecraft on Mars have been enjoying a […]

NASA’s Juno Mission observed pulsating electromagnetic ion cyclotron waves in Jupiter’s dawn magnetosphere that periodically expel energetic heavy ions into the atmosphere, producing stunning X-ray pulsations as captured by ESA XMM-Newton. Credit: ESA/NASA/Yao/Dunn An international research team led by YAO Zhonghua from the Institute of Geology and Geophysics of the […]

This processed image of Io by New Horizons shows the 290-kilometer-high (180-mile-high) plume of the volcano Tvashtar near Io’s north pole. Also visible is the Prometheus volcano’s much smaller plume in the 9 o’clock direction. The top of the Masubi volcano’s plume appears as an irregular bright patch near the […]

Ganymede flyby. Credit: NASA The probe flew closer to Jupiter’s largest moon, Ganymede, than any other spacecraft in more than two decades, offering dramatic glimpses of both the icy orb and the gas giant. On June 7, 2021, NASA’s Juno spacecraft flew closer to Jupiter’s ice-encrusted moon Ganymede than any […]