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Jupiter doesn't revolve around the sun

09.03.2021

The earth revolves around the sun. Mars revolves around the sun. Venus, Mercury, Neptune, Uranus, and Saturn too. The Moon and the International Space Station revolve around the Earth. But with the giant planet Jupiter, everything is somewhat more complicated.

When in outer space a less massive body revolves around a more massive one, the light does not describe perfect circles around the center of the heavy. In fact, both rotate, and the center of this rotation is the center of mass of both bodies. If the difference in mass is very large - as, for example, between our planet and the Sun - then the center of mass is located inside a more massive body, at a negligibly small distance from its geometric center. But if the mass of two bodies is comparable, then the center of mass can also be located in space outside both bodies.

The mass of Jupiter is 2,5 times the mass of all other objects in the solar system. The mass of Jupiter is 1 kg, and the mass of the Sun is 898 kg, with a difference of only 600 times.

Such a relatively small difference in mass shifts the point around which both the Sun and Jupiter move, mutually attracted by gravity. This point is, according to calculations, at a distance equal to 7% of the solar radius from the surface of the star. In other words, Jupiter, the only planet in the solar system, revolves around a point in space that is not inside the Sun, but outside it.

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Smart watch from Samsung 21.03.2013

Samsung is developing watches that can perform the same tasks as smartphones. Lee Young Hee, executive vice president of Samsung's mobile division, spoke about the device in an interview with Bloomberg.

"We are working on future products," said Lee Yong Hee, "and the watch will definitely be one of them." What exactly the device will be able to do when it goes on sale and how much it will cost, she did not specify.

The first rumors about the new "smart watch" Samsung appeared in February 2013. Then it was reported that they will run Android OS and will be called Galaxy Altius. In the same month, unofficial sources said that Apple is also preparing to release a watch that replaces a smartphone. The device, codenamed iWatch, will allegedly allow the user to make calls and check maps, and will also be able to act as a pedometer and heart rate sensor.

Samsung has released wristwatches in the past, combined with the phone. The device was called the SPH-WP10 and was released in 1999. The SPH-WP10 is considered the world's first "watch phone". Ten years later, a South Korean company introduced the S9110, a touch-screen watch phone with Bluetooth. The thickness of the body of the device was a record 2009 mm for 12.

Apple and Samsung are the main competitors in the smartphone market, while Samsung retains its title as the world's largest handset maker. Apple's mobile devices run on iOS, while Samsung's main operating system is Android.

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