What are the spokes astronomy?
Spokes are the ghostly radial markings discovered in the rings by NASA’s Voyager spacecraft 25 years ago. Since that time, spokes had been seen in images taken by NASA’s Hubble Space Telescope but had not, until now, been seen by Cassini.
What happened to the spokes in Saturn’s rings?
The leading theory is that charged dust particles suspended above and below the rings are interacting with Saturn’s magnetic field, causing the spokes to rotate with the planet’s interior spin.
How did Saturn get rings?
Rings. Saturn’s rings are thought to be pieces of comets, asteroids, or shattered moons that broke up before they reached the planet, torn apart by Saturn’s powerful gravity. They are made of billions of small chunks of ice and rock coated with other materials such as dust.
Why do astronomers believe the moon Titan may have been a planet captured by Neptune?
Why do astronomers believe Triton may have been a planet that was captured by Neptune? It orbits Neptune in the opposite direction of Neptune’s rotation. Why does Titan have such a nitrogen-rich atmosphere?
Can you see Saturn’s rings from Saturn?
To actually discern the rings as separate from the body of the planet requires at least 40x magnification, which means only a binocular telescope, equipped with high-magnification eyepieces, can truly show the rings of Saturn.
What is unique about Saturn’s moons Janus and Epimetheus?
Because Janus is four times more massive than Epimetheus, it fell four times less than Epimetheus rose. The switch of orbital altitudes made Janus — still ahead of Epimetheus in its orbit — the faster of the two.
What planet is extremely cold?
Uranus
The coldest planet in our solar system on record goes to Uranus which is closer to the Sun and ‘only’ about 20 times further away from the Sun than the Earth is. The lowest temperature recorded there was minus 224 degrees Celsius.
Where is Enceladus?
Saturn
Enceladus is one of the major inner satellites of Saturn along with Dione, Tethys, and Mimas. It orbits at 238,000 km from Saturn’s center and 180,000 km from its cloud tops, between the orbits of Mimas and Tethys.
Why is Saturn almost as big as Jupiter?
Why is Saturn almost as big as Jupiter, despite its smaller mass? All have cores of about the same mass, but differ in the amount of surrounding hydrogen and helium. How do the jovian planet interiors differ?
What is the definition of a spoke?
Definition of spoke (Entry 2 of 3) 1a : any of the small radiating bars inserted in the hub of a wheel to support the rim. b : something resembling the spoke of a wheel.
What is a spoked wheel?
A spoke is one of some number of rods radiating from the center of a wheel (the hub where the axle connects), connecting the hub with the round traction surface. A spoked wheel on display at the National Museum of Iran, in Tehran. The wheel is dated to the late 2nd millennium BC and was excavated at Choqa Zanbil.
What is the angle of a rim spoke?
a is the angle between (1) the radius to a nipple hole in the rim to which a spoke is attached, and, (2) the radius to the flange hole holding the spoke. The spoke crosses either 1, 2, or 3 oppositely pointing spokes depending on the lacing design. On the flange, the angle between the radii of adjacent holes is 360°/ m (for equally spaced holes).
What is the length of a bicycle spoke?
For bicycle spokes, the spoke length is defined from the flange seat to the thread tip. For spokes with bent ends, the nominal spoke length does not include the width of the spoke at the bent end.
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