Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid
These are organized by a classification scheme developed exclusively for Cosma. More…
Mercury : the planet nearest the sun — Webster
Mercury is the innermost and smallest planet in the Solar System, orbiting the Sun once every 87.969 Earth days. The orbit of Mercury has the highest eccentricity of all the Solar System planets, and it has the smallest axial tilt. It completes three rotations about its axis for every two orbits. Mercury is bright when viewed from Earth, ranging from −2.3 to 5.7 in apparent magnitude, but is not easily seen as its greatest angular separation from the Sun is only 28.3°. Since Mercury is normally lost in the glare of the Sun, unless there is a solar eclipse it can be viewed from Earth’s Northern Hemisphere only in morning or evening twilight, while its extreme elongations occur in declinations south of the celestial equator, such that it can be seen at favorable apparitions from moderate latitudes in the Southern Hemisphere in a fully dark sky. — Wikipedia
Mercury News -- ScienceDaily Planet Mercury News. Read science articles and see images of Mercury.
Mercury has a solid inner core: New evidence
on April 17, 2019 at 5:00 pm
Scientists have long known that Earth and Mercury have metallic cores. Like Earth, Mercury's outer core is composed of liquid metal, but there have only been hints that Mercury's innermost core is solid. Now, in a new study, scientists report evidence that Mercury's inner core is indeed solid and that it is very nearly the same size as Earth's solid inner core. […]
The true power of the solar wind
on June 12, 2018 at 2:57 pm
The planets and moons of our solar system are continuously being bombarded by particles from the sun. On the Moon or on Mercury, the uppermost layer of rock is gradually eroded by the impact of sun particles. New results show that previous models of this process are incomplete. The effects of solar wind bombardment are much more drastic than previously thought. […]
Mercury's thin, dense crust
on April 27, 2018 at 2:03 pm
A planetary scientist has used careful mathematical calculations to determine the density of Mercury's crust, which is thinner than anyone thought. […]
Meteorite diamonds tell of a lost planet
on April 18, 2018 at 6:48 pm
Scientists have examined a slice from a meteorite that contains large diamonds formed at high pressure. The study shows that the parent body from which the meteorite came was a planetary embryo of a size between Mercury and Mars. […]
Understanding Mercury's magnetic tail
on April 17, 2018 at 3:57 pm
Theoretical physicists used simulations to explain the unusual readings collected in 2009 by the Mercury Surface, Space Environment, Geochemistry, and Ranging mission. The origin of energetic electrons detected in Mercury's magnetic tail has puzzled scientists. This new study provides a possible solution to how these energetic electrons form. […]
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Apollo 11 moon mission drew space-related...
on July 10, 2019 at 3:30 pm
On May 25, 1961, President John F. Kennedy announced that the U.S. would land astronauts on the moon "before the decade is out." […]
Under a microscope: Startups grow meat in lab,...
on July 9, 2019 at 6:42 am
Uma Valeti slices into a pan-fried chicken cutlet in the kitchen of his startup, Memphis Meats. He sniffs the tender morsel on his fork before taking a bite. He chews slowly, absorbing the taste. […]
Five reasons future space travel should explore...
on July 8, 2019 at 1:10 pm
On the same day that the Earth survived an expected near-miss with asteroid 367943 Duende, Russian dashcams unexpectedly captured footage of a different asteroid as it slammed into the atmosphere, exploded, and injured more than 1,000 people. That day in Chelyabinsk in February 2013 reminded the world that the Earth does not exist in a bubble. […]
The mission of a lifetime: a drone on Titan in...
on July 4, 2019 at 5:09 pm
Elizabeth Turtle was overjoyed when, on June 26, she received a call from NASA: her project to send a drone quadcopter to Titan, Saturn's largest moon, was given the green light, which came with a budget of nearly a billion dollars. […]
Flying on Saturn's moon Titan: What we could...
on July 4, 2019 at 2:10 pm
Flying on other worlds is the next leap in the exploration of our solar system. The Mars Helicopter will piggyback on the NASA Mars 2020 rover mission to demonstrate the technology. But this is only the start. The real prize will be the Dragonfly mission in 2026, sending a drone to Saturn's largest moon, Titan – as just announced by NASA. […]