Most fast coronal mass ejections will be decelerated into ambient solar wind quickly in the inner heliosphere, but some of them continue the deceleration with an even larger amplitude beyond 1 AU.
Space & Planets
Posted inNews
A Decade of Atmospheric Data Aids Black Hole Observers
Astrophysicists are using a global atmospheric model to help them coordinate a multicontinent, radio-frequency observing campaign to gaze at the black hole at the center of the Milky Way.
Posted inResearch Spotlights
History of Water on Mars’s Surface Is Longer Than We Thought
Curiosity’s two-step heating experiment of mudstone at Gale crater reveals minerals that formed in the presence of water less than 3 billion years ago.
Posted inResearch Spotlights
Seeking Salt That Surfaces from Europa’s Hidden Ocean
Irradiation-induced color changes in sodium chloride could reveal whether it came from ocean water mixing with surface water, a key component of the moon’s potential to support life.
Posted inEditors' Highlights
Space Weather: Exploiting Meteorology’s Toolkit
Space weather forecasting is benefiting, and can benefit much further, from concepts and tools already developed by the global meteorological community.
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Looking to the Future of Exoplanet Science
Upcoming missions seeking to unravel the secrets of exoplanets abound. An informal survey of astronomers revealed which of those projects they most eagerly await.
Posted inEditors' Highlights
A Close-in Look at Saturn’s Periodic Space Bubble
When it comes to Saturn’s space environment, summer wins over winter in controlling the periodic flows of electrically charged particles and magnetic fields.
Posted inResearch Spotlights
Space Weathering Asymmetrically Alters Lunar Crater Walls
Directional differences in craters’ optical properties suggest that the solar wind, not tiny meteorites, is the main driver of space weathering on the Moon.
Posted inResearch Spotlights
Tracing the Path of Gas Atoms from Earth to the Final Frontier
Scientists capture the first complete image of Earth’s luminous geocorona and prove its ecliptic north–south symmetry.
Posted inEditors' Highlights
New Observations of Mysterious Radar Echoes
Exploring the relationship between solar extreme ultraviolet radiation flux and 150-km radar echoes.