Scientists have discovered a new, persistent structure in Earth's inner radiation belt using data from the twin NASA Van Allen Probes spacecraft. Most surprisingly, this structure is produced by the slow rotation of Earth, previously considered incapable of affecting the motion of radiation belt particles, which have velocities approaching the speed of light.
Researchers have detected water vapor in the atmosphere of a planet outside our solar system. The team applied a sophisticated Doppler technique to the infrared to directly detect the planet and demonstrate the presence of water in its atmosphere.
On July 23, 2012, a huge magnetic storm propelled by two nearly simultaneous coronal mass ejections on the sun plowed through Earth's orbit. Luckily, Earth was on the other side of the sun at the time. Had the outburst hit Earth, however, it would have rivaled the largest magnetic storm to strike Earth in recorded history, possibly wreaking havoc with the electrical grid, satellites and GPS.
Scientists uncover the origin and cause of an extreme space weather event that occurred on July 22, 2012 at the sun and generated the fastest solar wind speed ever recorded directly by a solar wind instrument.
A powerful, new three-dimensional model provides fresh insight into the turbulent death throes of supernovas, whose final explosions outshine entire galaxies and populate the universe with elements that make life on Earth possible.
Scientists, using cameras aboard NASA's Lunar Reconnaissance Orbiter (LRO), have created the largest high resolution mosaic of our moon's north polar region. The six-and-a-half feet (two-meters)-per-pixel images cover an area equal to more than one-quarter of the United States.
New global imaging and topographic data from MESSENGER show that the innermost planet has contracted far more than previous estimates. The results are based on a global study of more than 5,900 geological landforms, such as curving cliff-like scarps and wrinkle ridges, that have resulted from the planet's contraction as Mercury cooled. The findings are key to understanding the planet's thermal, tectonic, and volcanic history, and the structure of its unusually large metallic core.
Water, salts and gases dissolved in the huge ocean that scientists believe could exist below Europa's icy crust can rise to the surface generating the enigmatic geological formations associated to red-tinged materials that can be seen on this Jupiter's satellite.
A new study by ESA's Clean Space initiative - tasked with reducing the space industry's environmental impacts on both Earth and space - aims to evaluate battery behaviour after a satellite shuts down, assessing the risk of breakup and ensuring full 'passivation'.
ESO's Very Large Telescope has revealed the largest yellow star - and one of the 10 largest stars found so far. This hypergiant has been found to measure more than 1,300 times the diameter of the Sun, and to be part of a double star system, with the second component so close that it is in contact with the main star. Observations spanning over 60 years also indicate that this remarkable object is changing very rapidly.
Most of the galaxies that have been observed from the early days of the universe were young and actively forming stars. Now, an international team of astronomers have discovered galaxies that were already mature and massive in the early days. Fifteen mature galaxies were found at a record-breaking average distance of 12 billion light years, when the universe was just 1.6 billion years old. Their existence at such an early time raises new questions about what forced them to grow up so quickly.