Star cluster NGC 2203 has helped astronomers puzzle together the lifetimes of stars. These lines can be seen intersecting craters on Rhea (1528 kilometers, 949 miles across). Scientists have developed a new model that predicted seven out of nine of the Sun’s biggest recent flares.
Dr. Lori Glaze
Therefore, at Enceladus, a strong continuous source is required to maintain the atmosphere.The need for such a strong source leads scientists to consider eruptions, such as volcanoes and geysers.
Enceladus Atmosphere - Star Struck 07.29.05 During the July 14, 2005, flyby of Saturn's moon Enceladus, Cassini's ultraviolet imaging spectrograph made the first direct detection of an atmosphere, first suggested by Cassini magnetometer measurements.
The second to last piece of hardware for the Artemis I test flight around the Moon has arrived at Kennedy Space Center.
Cassini has sighted Prometheus and Pan... This image, taken by NASA's Dawn spacecraft, shows the surface of dwarf planet Ceres from an altitude of 915 miles (1,470 kilometers). On March 9, Cassini approached to within 500 kilometers (310 miles) of Enceladus' surface and obtained additional evidence.The observations showed a bending of the magnetic field, with the magnetospheric plasma being slowed and deflected by the moon. Director, NASA Planetary Science Division: The second to last piece of hardware for the Artemis I test flight around the Moon has arrived at Kennedy Space Center. This artist concept shows the detection of an atmosphere on Saturn's icy moon Enceladus.
Enceladus has an extremely thin atmosphere consisting mainly of water vapor. Examination of the resulting highest-resolution imagery revealed at least five different types of terrain, including several regions of cratered terrain, regions of smooth (young) terrain, and lanes of ridged terrain often bordering the smooth areas. Herschel has shown that water expelled from Saturn's moon Enceladus forms a giant ring around Saturn. It also explains the source of the water in Saturn's upper atmosphere. The Suomi NPP satellite is providing visible imagery and the Aqua satellite is providing temperature information on the tropical system.
Scientists, using Cassini's magnetometer instrument for their studies, say the source may be volcanism, geysers, or gases escaping from the surface or the interior.When Cassini had its first encounter with Enceladus on Feb. 17 at an altitude of 1,167 kilometers (725 miles), the magnetometer instrument saw a striking signature in the magnetic field. To get the best experience possible, please download a compatible browser. + See unannotated version The amount of gravity it exerts is not enough to hold an atmosphere very long.
Although Janus should be the least lonely of all moons - sharing its orbit with Epimetheus - it still spends most of its orbit far from other moons, alone in the vastness of space. Dr. Lori Glaze Saturn...
Enceladus' surface is composed mostly of nearly pure water ice except near its south pole, where there are light organics, CO2, and amorphous and crystalline water ice, particularly in … Enceladus, a small moon just 500 km in diameter, has fissures near its south pole, known as the Tiger Stripes, out of which it expels around 250kg of water ever second. The graphic shows the magnetic field observed by Cassini along its trajectory plotted in a vector form.
Enceladus Temperature. A surge in brightness appears on the rings directly opposite the Sun from the Cassini spacecraft. The moon is far too small to hold on to its own atmosphere but it is being constantly replenished by eruptions of ice from its surface. Full-Res: PIA05387 If such eruptions are present, Enceladus would join two other such active moons, Io at Jupiter and Triton at Neptune. Some of the craters have fresh, sharp rims, which suggests that they are...
In addition, magnetic field oscillations were observed. The light of the star dimmed as it was obscured by the atmosphere before being blocked entirely by Enceladus itself.
The Cassini spacecraft's two close flybys of Saturn's icy moon Enceladus have revealed that the moon has a significant atmosphere.
The E ring is mostly made of ice droplets, but among them are peculiar nanoparticles. It's possible detection was beyond Voyager's capabilities, or something may have changed since that flyby.This is the first time since Cassini arrived in orbit around Saturn last summer that an atmosphere has been detected around a moon of Saturn, other than its largest moon, Titan.
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Credit: NASA/JPL/University of Colorado Cassini detected these passing silica nanograins, which can only be generated where liquid water and rock interact at temperatures above 90 degrees Celsius (about 200 degrees F).
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