Thursday , June 24 2021

Can the moons have moons? | space



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Dimensions of large moons in the solar system.

Comparison of the size of the large moons in our solar system by Emily Lakdaulla.

Most of the planets in our solar system have orbital moons and even some asteroids have their own moons. But do everything moons are there moons? Is it possible? Can there be so-called submoons? Carnegie Science's Juna Collmeyer said her 4-year-old son had raised her interest in this subject by asking this seemingly logical question. The question is simple enough. If most other objects in the solar system can have moons, why not the moons themselves?

Kollmeier decided to try to answer the question, along with colleague Shaun Raymond of the Université de Bordeaux. Their results have already been published in a new publication published in February 2019 Monthly announcements of the Royal Astronomical Society,

As explained by Raymond in a statement from Carnegie Science:

The planets orbiting stars and moons orbits, so it is natural to ask whether the smaller moons can travel larger orbits.

Until now, no moons have been found that can be found around some of the moons most likely supposed to support them – the moon of Jupiter Calisto, the moons of Saturn Titan and the Japhets and the moon on Earth. According to Kollmayer:

The lack of known moons in our solar system, even in orbit around the moons that could theoretically support such objects, can provide us with clues about how our own and neighboring planets are formed for which there are still many unresolved issues.

Earth moon.

Earth moon theoretically should have its own moon. Why not? Image by NASA / Goddard.

Researchers have discovered that only large satellites of broad orbits from their receiving planets could receive sub-moons. Generally, all the subterfuge, which circulates around the smaller moons closer to their planet, could destabilize their orbits from the tidal forces. The big moon of Jupiter Calisto, the moon of Saturn Titan, another moon of Saturn called Jape and the moon on Earth all theoretically can have swords, so why?

Researchers say there may be other sources of submergence instability, such as the uneven mass concentration in the earth's crust.

Asteroid 2004 BL86 with its moon.

Even asteroids can have moons, like 2004 BL86. Its diameter is about 1100 feet (325 meters) and its moon is small, 70 meters wide. Image via NASA.

Part of the answer may also be related to how the primary moons are formed first. It is believed that the moon on Earth is born from a collision between the Earth and another Mars-sized body – and that collisions may have helped Earth's life begin. But some other moons, like those that circle around Jupiter and Saturn, come from the same cloud of gas and dust from which the planets themselves have formed. Collmaier added:

And, of course, this could lead to ongoing efforts to understand how planetary systems are developing elsewhere and how our own solar system fits into thousands of others discovered by planet-hunting missions.

It may be that in many or even in most cases there are many factors that make the orbits of the replacements essentially unstable. To know whether this is true or not, you may have to wait for the discoveries of the moons that run around distant exoplanets. The moons themselves are much more difficult to detect, and only one promising candidate has been discovered – a possible exomus in orbit around the Jupiter Kepler-1625b exoplanet. This possible moon, the size of Neptune, is big enough and far enough from its planet that it should also be possible to replace it. Astronomers will have to check the initial moon before they find it before searching for it.

Pluto and Charon.

Even the little Pluto is there five The moons, including the greatest – Haron – are shown here. How many moons with their own moons might be there? Image by NASA / JHUAPL / SWRI.

Although the Earth moon now has no underwater trait, it may in the future, according to the researchers, be artificial, perhaps the Lunar Portal planned by NASA. The Lunar Gateway will help establish the presence of humanity in deep space, as stated by William Gerstenmeyer, Human Resources and Operations Director at NASA's Headquarters:

The portal will give us a strategic presence in the cynical space. It will lead our business with trade and international partners and help us explore the Moon and its resources. In the end, we will translate this experience into human missions on Mars.

Raymond has also written a cool poem about moon moons that you can enjoy on his blog here.

Ultimately, the possibility of moons having their own moons is charming, although we have not found any examples yet. This new study by Carnegie Science shows that this is indeed the case possible, but only in appropriate circumstances.

Source: Can the moons have moons?

Via Carnegie Science

Paul Scott Anderson


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