Jupiter's Galilean Moons
Images related to my article at http://www.bellaonline.com/articles/art42279.asp, about Jupiter's four largest moons.
Jupiter's Galilean Moons
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Jupiter And Satellites. (Credit: Giorgia Hofer on February 4, 2015 @ Laggio di Cadore, Veneto, Italy.) The opposition of Jupiter is on February 6. This is when Jupiter, the Earth and the Sun are aligned - Jupiter is at its closest to us at opposition.
Jupiter And Satellites
Jupiter's Icy Moon Europa: Best Bet for Alien Life?
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NASA Eyes Ambitious Mission to Jupiter's Icy Moon Europa by 2025 Infographic: Jupiter's moon Europa has a huge underground ocean.
Europa, Moon of Jupiter. Credits: Space.com
Infographic: Jupiter's moon Europa has a huge underground ocean. #jupiter #science #astronomy
Jupiter's Icy Moon Europa: Best Bet for Alien Life?
Jupiter's moon Europa during Voyager 2 close approach (1979-07-09). It was quite a surprise at the time to find that Europa has a crust of ice. The complex array of streaks indicate that the crust has been fractured and filled by materials from the interior. Europa has very few impact craters. Mona Evans, "Voyager 2 - the Grand Tour" www.bellaonline.c...
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Jovian moon Europa (July 9, 1996). Voyager 2, despite its name, was the first of two twin probes launched in 1977 to explore the outer planets. While Voyager 1 focused on Jupiter and Saturn, Voyager 2 took close-up pictures of those planets as well as Uranus and Neptune. Voyager 2's mission to those last two planets would be humanity's only visit there in the 21st century. Even today, the spacecraft is still beaming back information from the very edge of the solar system.
Of the more than 60 moons that have been discovered around the planet Jupiter, Europa is perhaps the most enigmatic, as experts believe an ocean deep beneath the surface of the icy moon could possibly contain some form of life.
This color image of the Jovian moon Europa was acquired by NASA's Voyager 2 during its close encounter on Jul. 9, 1979. Europa, the size of our moon, is thought to have a crust of ice perhaps 100 kilometers thick which overlies the silicate crust.
Water vapor venting from Jupiter’s moon, Europa | EarthSky.org - If these plumes vent from Europa’s subsurface water ocean, future scientists won’t need to drill into Europa’s icy crust to investigate the potential for life in that alien sea.
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Hubble Space Telescope observations show water vapor on Jupiter's moon Europa. If this is coming through surface cracks from Europa's subsurface ocean, it could have a lot of information on what's there. This is an artist's impression showing Europa with Jupiter in the background. (Image credit: NASA, ESA, and M. Kornmesser) Mona Evans, "Jupiter's Galilean Moons" www.bellaonline.c...
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Hubble Discovers Water Plumes Over Europa
Internal structure of Io, Europa, Ganymede and Callisto. © based on NASA images. More about the Galilean moons in Mona Evans, "Jupiter's Galilean Moons" www.bellaonline.c...
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Recent observations of Jupiter’s moon Io has revealed a massive volcanic eruption taking place 628,300,000 km (390,400,000 miles) from Earth. Io, the innermost of the four largest moons around Jupiter, is the most volcanically active object in the Solar System with about 240 active regions. - http://www.universetoday.com/104317/major-volcanic-eruption-seen-on-jupiters-moon-io/#ixzz2cqOzcoQy
Volcanic explosion on Io. Image taken by Voyager 1 on 1979-03-04. The explosion is silhouetted over Io's bright limb. The color of the volcanic limb is true, but the brightness has been increased, as it's very faint. (Credit: NASA/JPL) Mona Evans, "Jupiter's Galilean Moons" www.bellaonline.c...
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Voyager 1 acquired this image of Io on March 4, 1971. An enormous volcanic explosion can be seen silhouetted against dark space over Io's bright limb. Credit: NASA/JPL.
Recent observations of Jupiter’s moon Io has revealed a massive volcanic eruption taking place 628,300,000 km (390,400,000 miles) from Earth. Io, the innermost of the 4 largest moons around Jupiter, is the most volcanically active object in the Solar System with about 240 active regions. Dr. Imke de Pater, Professor of Astronomy & of Earth & Planetary Science at the University of California in Berkeley was using the Keck II telescope on Mauna Kea in Hawaii on 15 August/13.
When NASA’s Voyager 1 mission zipped by the Jupiter system in 1979, it discovered that far from the sun were incredibly active worlds. In particular, it shot spectacular pictures of the moon Io, which is covered in volcanoes and is now known to be one of the most geologically active places in the solar system. This image shows a plume from a volcano on Io’s surface. Image: NASA/JPL
Jupiter’s moon Io and its tiny shadow sweep across the giant planet’s face back in 1999, as snapped by the Hubble Space Telescope. [Credit: John Spencer (Lowell Observatory) and NASA] Mona Evans, "Jupiter's Galilean Moons" www.bellaonline.c...
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Jupiter’s Moon Io Photograph courtesy John Spencer (Lowell Observatory) and NASA In 1999, to commemorate the ninth anniversary since its launch, the Hubble Space Telescope took this dramatic snapshot of Jupiter’s moon Io and its shadow sweeping across the gas giant’s turbulent atmosphere. About the size of Earth’s moon, Io is the most volcanic body in the solar system and orbits 500,000 kilometers above the planet’s cloud tops.
Io Transit of Jupiter... Io is roughly the size of Earth's moon and zips around Jupiter in 1.8 days. The conspicuous black spot on Jupiter is Io's shadow and is about the size of the moon itself (2,262 miles or 3,640 kilometers across). This shadow sails across the face of Jupiter at 38,000 mph (17 kilometers per second). The smallest details visible on Io and Jupiter measure 93 miles (150 kilometers) across, or about the size of Connecticut.
"Jupiter with Io and Ganymede" by Damien Peach. Winner of the Astrophotographer of the Year 2011 competition. An impressive image that compares well with those taken with large telescopes. At the lower left is Io and the larger moon is Ganymede. ©Mona Evans, "Jupiter's Galilean Moons" www.bellaonline.c...
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Jupiter From the Ground. This image of Jupiter & its moons Io & Ganymede was acquired by amateur astronomer Damian Peach on Sept. 12, 2010, when Jupiter was close to opposition. South is up and the "Great Red Spot" is visible in the image...
Jupiter's nearest large moon, Io, is the most volcanically active body in the solar system, and all those eruptions pour a stream of charged particles into space. These are grabbed by Jupiter’s magnetic field and whirled around at high speed. The particles then slam into the planet’s atmosphere, causing them to glow and producing the aurora. The high-speed motion also causes the particles to emit powerful radio waves—twisted waves, given how rapidly they’re spinning. (Time Space & Science)
Aurora on Jupiter's volcanic moon Io. [Credit: Galileo Project, University Of Arizona (PIRL), JPL, NASA] APOD wondered if any planet other than Earth had both volcanos and auroarae. Probably not, but Jupiter's moon Io does. Interactions between Jupiter and Io cause aurorae on both planet and moon. ©Mona Evans, "Jupiter's Galilean Moons." www.bellaonline.c...
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The vivid colors, caused by collisions between Io's atmospheric gases and energetic charged particles trapped in Jupiter's magnetic field, had not previously been observed. The green and red emissions are probably produced by mechanisms similar to those in Earth's polar regions that produce the aurora, or northern and southern lights. Bright blue glows mark the sites of dense plumes of volcanic vapor, and may be places where Io is electrically connected to Jupiter.
Galileo Galilei (1564-1642). He was one of the first to use a telescope for astronomical purposes. Galileo discovered the four largest moons of Jupiter, which are now called the Galilean moons. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...
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Galileo- Father of star searching, what a pioneer.
Aforismi e citazioni di Galileo Galilei
We cannot teach people anything; we can only help them discover it within themselves. Galileo Galilei
Galileo 1564 to 1642. Physics, Astronomy, Social
German astronomer Simon Marius (1573-1624). Four years after Galileo's account of his discovery of the Jovian moons, Marius claimed that he had discovered them before Galileo. Marius didn't get the credit, but the names in use today are those suggested by Marius. They are names of amorous conquests of Zeus (the Greek equivalent of Jupiter). ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...
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Simon Marius 1573-1624) fue un astrónomo alemán. En 1614 Marius publicó una obra titulada Mundus Iovialis en la que describía el sistema de Júpiter y sus lunas que habían sido descritas cuatro años antes por Galileo. Simon Marius también afirmaba haber descubierto la Galaxia de Andrómeda, descubrimiento éste atribuido a astrónomos árabes de la Edad Media y conocido en la época de Marius.
Simon Marius fue un astrónomo alemán. Detecta a la nebulosa de Andrómeda y tres de las lunas de Júpiter. Fue el que propuso los nombres que actualmente poseen estas lunas.
As befits the colossus of the Solar System, Jupiter has four of the system's largest moons: Ganymede, Callisto, Io and Europa. See them compared to other Solar System objects. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...
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Star Size Comparison | Astronomy: Outer Planets and Large Moons
terrestrial planets | ... 38 the terrestrial planets relative sizes of the terrestrial planets
The 1:2:4 orbital resonance of the three inner Galilean moons. They are tidally locked, which means they keep the same face towards Jupiter as they orbit. In addition, they orbit in what's called a resonance created by a combination of Jupiter's gravity and the gravity of the moons themselves. Each time Ganymede orbits Jupiter, Europa orbits twice and Io four times. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...
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Jupiter's Galilean moons' orbital resonance
Europa (moon) - Wikipedia, the free encyclopedia
Jupiter and Earth's moon, and the beautiful dance of Jupiter's moons | Tonight | EarthSky
Animation showing Io's Laplace resonance with Europa and Ganymede.
Io. The most volcanically active body in the Solar System, it's about the same size as the Moon and orbits at about the same distance from Jupiter as the Moon does from Earth. Yet it has over 400 volcanoes and a “month” on Io lasts only 42 hours. This is all down to gravity. Caught between Jupiter's strong gravity and that of its companions Callisto & Ganymede, Io is mercilessly squeezed, releasing heat. ©Mona Evans,"Jupiter's Galilean Moons" http://www.bellaonline.com/articles/art42279.asp
Io. The most volcanically active body in the Solar System, it's about the same size as the Moon and orbits at about the same distance from Jupiter as the Moon does from Earth. Yet it has over 400 volcanoes and a “month” on Io lasts only 42 hours. This is all down to gravity. Caught between Jupiter's strong gravity and that of its companions Callisto & Ganymede, Io is mercilessly squeezed, releasing heat. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...
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Io, the most volcanic body in the solar system, is seen in front of Jupiter's cloudy atmosphere in this image from NASA's Galileo spacecraft, which orbited the giant planet on September 7, 1996.
NASA - Image of the Day - Galleryj Io is a colorful place. The closest large moon of Jupiter, Io has the most volcanic activity of any moon in the solar system with its surface being completely buried in volcanic lava every few thousand years. The black and red material corresponds to the most recent volcanic eruptions and is probably no more than a few years old. This image by the automated spacecraft Galileo highlights the side of Io that always faces away from Jupiter.
New species of benthoctopus found in a deep hydrothermal vent. Life has evolved there to use chemical energy rather than the energy of sunlight. Jupiter's moon Europa has a deep liquid ocean under the ice which is warmed by tidal heating. Astrobiologists think that Europa's ocean is the best place to find extraterrestrial life in the Solar System. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...
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Europa. It's covered in ice and is one of the smoothest objects in the Solar System. The small number of craters shows that the surface is young, possibly only a 100 million years old. (That's young geologically.) In this picture you can see that there are also cracks and streaks. The cracking is caused by tidal heating, but we don't know exactly what the staining is. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...
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Europa, another moon of Jupiter, has one of the smoothest surfaces in the solar system. That’s because the entire moon is a single ocean of water with an ice crust on the surface.
A growing body of evidence suggests that there is a vast liquid ocean lurking underneath Europa's solid surface, and a lot of scientists are eager to tap this watery interior in search of life. As Michael Shara — curator of the astrophysics division at the American Museum of Natural History — told us: "If we can figure out a way of putting a probe through the ice… who knows what we could find -- I'll tell you what they'll find in two words: The Thing =O
Jupiter's moon Europa (shown here) contains a liquid ocean underneath a frozen crust that may be home to tiny life forms. Overall, it's estimated that there could be more than 100 million planets capable of supporting life in the Milky Way galaxy. You can read more about this astrobiology estimation on the Biology Bytes blog: http://www.biology-bytes.com/ (Also, you can get updates directly on the blog through its Facebook group: https://www.facebook.com/RowlandBiologyBytes)
*** Europa, moon of Jupiter - Outer Space | Wow
Europa, Jupiter's fourth largest moon, is one of the most likely places in the Solar System to host life outside of Earth, due to the ocean made of water that is expected to lie under the icy shell. Despite its distance from the sun, the water remains liquid due to the tidal forces the moon experiences, where the constant push and pull of Jupiter's gravity helps to heat it.
My favorite of Jupiters moons... Europa. Scientists believe there could be a liquid ocean of water underneath the icy crust
Ganymede. It's bigger than Mercury, has a liquid iron core and is the only moon in the Solar System with its own magnetic field. The terrain is varied, but there are broadly two different types: heavily-cratered dark regions (evidence of great age) and brighter regions showing patterns of ridges and grooves for thousands of miles, suggesting later geological activity, but nonetheless ancient. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...
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Ganymede - Jupiter moon - largest moon in our solar system - 5268 km diameter (larger than the planet, Mercury)
This is a natural color view of Ganymede. North is to the top of the picture and the sun illuminates the surface from the right. The dark areas are the older, more heavily cratered regions and the light areas are younger, tectonically deformed regions. The brownish-gray color is due to mixtures of rocky materials and ice. Bright spots are geologically recent impact craters and their ejecta. The images which combine for this color image were taken 26 June 1996 beginning at Universal Time 8:46:04.
Callisto. This Jovian moon seems to be the odd one out. It's far enough away from the other three Galilean moons that it isn't part of the orbital resonance and its interior isn't warmed by tidal heating. It's also the least dense of the moons and shows the least internal layering. ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...
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This is an image of Callisto, one of the moons of Jupiter. Discovered by Galileo Galilei in 1610, it is the third largest moon in the Solar System and features a heavily cratered surface.
This is Callisto, a Jupiter moon discovered by Galileo in 1610, and also the third largest moon in our solar system.
Jupiter's moon Callisto, the 3rd largest in the solar system, imaged from the Galileo spacecraft / #science #space #galaxy #educational #planet
Jupiter's moon Callisto is tidally locked to its revolution around the planet, so that the same hemisphere always faces inward; Jupiter appears to stand still in Callisto's sky.
Jupiter's moon Callisto | Astronomy
Valhalla Crater on Callisto. Callisto is the most heavily cratered satellite in the Solar System. Its surface has apparently been primarily sculpted by impacts. Valhalla is its largest crater - it's 360 km (225 miles) across and the rings extend to 1900 km (1190 miles) from its center. (Photo: NASA) ©Mona Evans,"Jupiter's Galilean Moons" www.bellaonline.c...