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The sizes and masses of many of the moons of Jupiter and Saturn are fairly well known due to numerous observations and interactions of the Galileo and Cassini orbiters; however, many of the moons with a radius less than ~100 km, such as Jupiter's Himalia, have far less certain masses. [5]
For these reasons Jupiter has the highest frequency of impacts of any planet in the Solar System, justifying its reputation as the "sweeper" or "cosmic vacuum cleaner" of the Solar System. [7] 2018 studies estimate that between 10 and 65 impacts per year of meteoroids with a diameter of between 5 and 20 meters (16 and 66 ft) can occur on the ...
In most years, the most visible meteor shower is the Perseids, which peak on 12 August of each year at over one meteor per minute. NASA has a tool to calculate how many meteors per hour are visible from one's observing location. The Leonid meteor shower peaks around 17 November of each year. The Leonid shower produces a meteor storm, peaking at ...
The Geminid meteor shower peaks on the night of Thursday, Dec. 12, into the early hours of Friday, Dec. 13. Most years, it boasts up to 120 meteors per hour; however, a nearly full moon will ...
The American Meteor Society estimates that the Geminids will produce up to 15 visible meteors per hour. ... about a day after the peak, so that moonlight is going to wash out the meteors,” Cooke ...
The Perseids can produce about one to two meteors per minute or between 50 to 100 per hour, according to NASA. But you can only catch a show like that under ideal viewing conditions.
Thus, the Sun occupies 0.00001% (1 part in 10 7) of the volume of a sphere with a radius the size of Earth's orbit, whereas Earth's volume is roughly 1 millionth (10 −6) that of the Sun. Jupiter, the largest planet, is 5.2 AU from the Sun and has a radius of 71,000 km (0.00047 AU; 44,000 mi), whereas the most distant planet, Neptune, is 30 AU ...
A fireball is defined as a meteor that is brighter than planet Venus and is caused by a larger-size meteor that could exceed 1 meter (more than 3 feet) in diameter, according to NASA.