Space Exploration News

Internal Heating from Radioactive Elements May Be Crucial to Planet Habitability, Study Says

These illustrations show three versions of a rocky planet with different amounts of internal heating from radioactive elements. The middle planet is Earth-like, with plate tectonics and an internal dynamo generating a magnetic field. The top planet, with more radiogenic heating, has extreme volcanism but no dynamo or magnetic field. The bottom planet, with less radiogenic heating, is geologically ‘dead,’ with no volcanism. Image credit: Melissa Weiss.
Nov 12, 2020 by News Staff

The thermal evolution of rocky planets depends on the heat input from three long-lived radiogenic elements: potassium, thorium, and uranium. Concentrations of the latter two in the mantle of rocky planets are likely to vary by up to an order of magnitude between different planetary systems because these elements are produced by rare stellar processes. In a new paper published in the Astrophysical Journal Letters, a team of researchers from the University...

read more...
This artist’s conception of Europa shows a hypothesized cryovolcanic eruption, in which briny water from within the icy shell blasts into space. Image credit: Justice Blaine Wainwright.

Europa’s Plumes May Originate from Near-Surface Brine Reservoirs, Not Global Ocean

Nov 11, 2020 by News Staff

Europa, the sixth of Jupiter’s moons and the fourth largest, has a subsurface ocean covered by an icy shell. Despite evidence for plumes on the icy moon,...

The young Mars would have had enough water to cover its entire surface in a liquid layer about 140 m deep, but it is more likely that the liquid would have pooled to form an ocean occupying almost half of Mars’s northern hemisphere, and in some regions reaching depths greater than 1.6 km. Image credit: M. Kornmesser / ESO / N. Risinger, skysurvey.org.

Water Present on All Rocky Planets, Martian Meteorite Study Suggests

Nov 10, 2020 by News Staff

Water may emerge in connection with the formation of terrestrial planets, according to a new analysis of a Martian meteorite called North West Africa (NWA)...

This illustration of Jupiter’s moon Europa shows how its icy surface may glow on its nightside. Image credit: NASA / JPL-Caltech.

Europa’s Icy Surface Glows in the Dark, New Study Suggests

Nov 10, 2020 by News Staff

Jupiter’s icy moon Europa is bombarded by a constant and intense blast of radiation from the gas giant. Different salty compounds on the moon’s surface...

This colorized radar image, taken by NASA’s Cassini orbiter on February 15, 2005, shows a 60-km (37-mile) wide crater on Titan. The appearance of the crater and the extremely bright (hence rough) blanket of material surrounding it is indicative of an origin by impact, in which a hypervelocity comet or asteroid, in this case, roughly 5-10 km (3-6 miles) in size, slammed into the surface of the moon. The bright surrounding blanket is debris, or ejecta, thrown out of the crater. The asymmetric appearance of this ejecta blanket could be an effect of atmospheric winds associated with the impact itself. Although clearly formed by impact, the feature lacks a central peak, suggesting that it has been eroded or otherwise modified after formation. Rainfall, wind erosion, and softening of the solid material in which the crater formed are all possible processes that might have altered this impact feature. Image credit: NASA / JPL-Caltech / ASI.

Cassini Finds Organics and Water Ice in Titan’s Impact Craters

Nov 6, 2020 by News Staff

Using the spectral data collected by the Visual and Infrared Mapping Spectrometer (VIMS) onboard NASA’s Cassini spacecraft, a team of researchers has...

This SEM image shows crystals of donwilhelmsite in Oued Awlitis 001. Image credit: Ansgar Greshake, Museum für Naturkunde Berlin.

New Mineral Discovered in Lunar Meteorite: Donwilhelmsite

Nov 5, 2020 by Natali Anderson

A team of researchers in Europe has identified a new high-pressure mineral in a lunar meteorite called Oued Awlitis 001. Fragments of Oued Awlitis 001....

This illustration of NASA’s Mars 2020 spacecraft in interplanetary space was generated using imagery from NASA’s Eyes on the Solar System. The image is from the mission’s midway point between Earth and Mars. Visible in the graphic are the solar panels on the cruise stage surrounding the top of the aeroshell. Image credit: NASA / JPL-Caltech.

Mars 2020 Spacecraft is Midway to Red Planet, NASA Says

Nov 5, 2020 by News Staff

On October 27, 2020, at 4:40 EDT (1:40 p.m. PDT), NASA’s Mars 2020 spacecraft, which includes the Perseverance rover and the Ingenuity helicopter, reached...

This image shows a triple crater in Noachis Terra, Mars. The largest crater measures 45 km across, and the smallest 28 km. There are also signs of other sizeable craters, such as the round patches of sunken surface seen to the top right and bottom left. This image comprises data gathered by ESA’s Mars Express using its High Resolution Stereo Camera (HRSC) on August 6, 2020. This image was created using data from the nadir and color channels of the HRSC. The nadir channel is aligned perpendicular to the surface of Mars, as if looking straight down at the surface. North is to the right. Image credit: ESA / DLR / FU Berlin / CC BY-SA 3.0 IGO.

Mars Express Spots Triple Crater on Red Planet

Nov 3, 2020 by News Staff

ESA’s Mars Express orbiter has spotted three overlapping craters in Noachis Terra, an extensive landmass in the southern hemisphere of Mars. This image...

This image shows OSIRIS-REx’s collector head hovering over the Sample Return Capsule after the Touch-And-Go Sample Acquisition Mechanism arm moved it into the proper position for capture. Image credit: NASA’s Goddard Space Flight Center / University of Arizona / Lockheed Martin.

OSIRIS-REx Stows Sample of Asteroid Bennu’s Regolith

Oct 30, 2020 by News Staff

On October 28, 2020, NASA’s OSIRIS-REx spacecraft successfully stowed its Sample Return Capsule (SRC) with a sample of surface material from the near-Earth...

This illustration shows what a sprite could look like in Jupiter’s atmosphere. Image credit: NASA / JPL-Caltech / SwRI.

Juno Observes Sprites and Elves in Upper Atmosphere of Jupiter

Oct 30, 2020 by News Staff

NASA’s Juno spacecraft has been in orbit around Jupiter since 2016. One of its instruments is the ultraviolet spectrograph (UVS), which is primarily...

A false-color view of Titan, a moon of Saturn surrounded by a thick orange haze. Image credit: NASA / JPL / University of Arizona / University of Idaho.

Cyclopropenylidene Detected in Atmosphere of Titan

Oct 28, 2020 by News Staff

Using high sensitivity spectroscopic observations from the Atacama Large Millimeter/submillimeter Array (ALMA), astronomers have detected a small cyclic...

A fragment of the Hamburg meteorite found on Strawberry Lake near Hamburg, Michigan, the United States. Image credit: Heck et al., doi: 10.1111/maps.13584.

Scientists Find Organic Compounds in Hamburg Meteorite

Oct 28, 2020 by News Staff

An international team of researchers has found extraterrestrial hydrocarbons, sulfurized and nitrogen-containing compounds in the Hamburg meteorite, which...

This image from OSIRIS-REx’s SamCam camera shows that the spacecraft’s sampler head is full of rocks and dust collected from the surface of Bennu. Image credit: NASA.

OSIRIS-REx Collects Sufficient Sample of Asteroid Bennu’s Regolith

Oct 26, 2020 by News Staff

During the ‘Touch-And-Go’ sample collection event on October 20, 2020, NASA’s OSIRIS-REx spacecraft collected more than enough surface material (at...

An artist concept of the OSIRIS-REx spacecraft. Image credit: NASA / Goddard.

New Images Show OSIRIS-REx’s Sample Collection on Bennu

Oct 23, 2020 by News Staff

Stunning new images, taken by the SamCam imager onboard NASA’s OSIRIS-REx spacecraft on October 20, 2020, show the historic Touch-And-Go (TAG) sample...

NASA’s OSIRIS-REx spacecraft readies itself to touch the surface of the near-Earth asteroid (101955) Bennu. Image credit: NASA’s Goddard Space Flight Center / University of Arizona.

OSIRIS-REx Attempts to Collect Sample of Near-Earth Asteroid Bennu

Oct 21, 2020 by News Staff

On October 20, 2020, NASA’s OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer) spacecraft briefly touched...

This year’s ozone hole over Antarctica is one of the largest in recent years. Image credit: ESA.

Ozone Hole over Antarctica is One of Largest and Deepest in Recent Years

Oct 20, 2020 by News Staff

The Antarctica’s ozone hole has now reached its maximum size, according to an analysis of data collected by ESA’s Copernicus Sentinel-5P satellite. This...

BepiColombo completed its first flyby of Venus on October 15, 2020, coming within 10,720 km of the planet for a gravity assist maneuver. Image credit: ESA / BepiColombo / MTM / CC BY-SA 3.0 IGO.

BepiColombo Makes Its First Flyby of Venus

Oct 16, 2020 by News Staff

BepiColombo, a joint endeavor between the European Space Agency (ESA) and the Japan Aerospace Exploration Agency (JAXA), successfully completed its first...

When the Moon had a magnetic field, it would have been shielded from incoming solar wind, as shown in this illustration. Image credit: NASA.

Moon’s Ancient Magnetosphere May Have Helped Early Earth Retain Its Atmosphere

Oct 15, 2020 by News Staff

Solar storms strip a planet’s atmosphere over time, and only a strong magnetosphere would be able to provide maximum protection. Lunar samples gathered...

Pluto’s Mountains are Capped with Methane Frost: Study

Oct 14, 2020 by News Staff

The bright frosts observed in 2015 in the equatorial region of Cthulhu on Pluto are mostly made of methane-rich ice, according to new research. This image,...

This oblique color view from the HiRISE instrument onboard NASA’s Mars Reconnaissance Orbiter shows a lithified field of sand dunes within Melas Chasma, Valles Marineris. The large degree of preserved morphology for many of these paleodunes reveals important information regarding the acting wind regime and climate prior to their cementation. Image credit: NASA / JPL / University of Arizona.

One-Billion-Year-Old Sand Dunes Spotted on Mars

Oct 12, 2020 by News Staff

Planetary researchers have mapped and characterized ancient sand dune fields in the canyons of Valles Marineris on Mars. Their discovery offers new insights...

© 2011-2026. Sci.News. All Rights Reserved. | Back to top