How many rude planets are the dairy way?
According to new simulations, many, even most, planets come out of their star at the beginning of their history
The impression of the impression of an artist’s impression, in the depths of interstellar space.
Pablo Carlos Budassi / Stopter Images / Alamy Stock Photo
As Jrr Tolkien wrote A Ring scholarship, “Not all wandering wander is lost.” But in the case of plants, most likely is are the reasons.
Certainly planets, planets without limited to any star, has been the subject of science fiction for a long time; both Star trek and Space: 1999 They appeared in the passages. But they really exist in real life. Astronomers, sometimes those who like to die fun, calling these worlds Floating free planet, That’s not as nice as almost as a term.
However, these star fugitives are quite interesting. Most are found through mikrolensing: Their gravity acts as a lens that increases the light of a background. These worlds are so small, dark and far away that are invisible to us. Some, similar to Mass Jupiter, has been visible in the images; It is possible that gas and dust directly formed in a nebulaAs a star does, so it has always been a house star. But others, much lower mass, is expected to be formed only around a star, exiting their planetary system. Now, they are silent and cold through the sun spaces.
To help Science Journalism
If you enjoy this article, consider entering award-winning journalism Subscribe. By purchasing subscription, you are helping to ensure the future of stories about the discoveries and ideas that are conformed to today.
How to eject? While there are some possible methods, the most common is likely to interact with another planet around its host star. We know that the planets do not orbit its star in the same place forever. Over time, the orbits of the planet can change due to the gravatives of other planets in a system. If the two planets approach each other, interactions (usually two less massive) can cause many orbital energy, which has been left out of the system.
A group of astronomers at the Technical-Israeli Institute of Technology studied this question and presented his results in a new paper Waiting for publication Astrophysical magazine. Researchers are called N-Body simulations, computer models that use gravity and motion equations to simulate positions and orbits over time. The entry parameters are repeatedly running, these models can provide statistical stimuli, such as certain events that may occur.
The group made simulations of 100 system planet, each consisting of anywhere between the three and 10 planets, which were like the worlds of our solar system. Then the equations simulated for a million years.
The encounter was quite common for the encounters. There are many interactions between the planets that some are collected in stretched orbits that cross the path of another. What can happen is so live collision, which is The colossal effect that the planet can break or cause at least extreme damage. The result is more common than believed that average, average of 0.4 times per planet system (so in 100 systems, you expect to see about 40 collisions). They will happen early; Most home simulation occurs within a million years.
But, however, the group was more commonly attributed to the system for each 3.5 planet system and after a billion years, and the first 100 million years occur. The result was surprised; Considering that only three and 10 planets per simulations were only three to 10, I wouldn’t think it would be so much rain. But that is what scientists do these types of calculations; Our expectations can be naughty while they are not math and physics.
Researchers also found that the planet should be attributed to simulations anywhere, so that they may not be secure and external planets, even if the secret planet was first ejected. Canceled planets usually ride a relatively quiet system for about two and six miles per second. The earth orbiting the sun in more than 30 km / seconds, so the speed of the rain is relatively low.
It is very interesting that the systems with fewer planets are 100 million years old that they tend to extract the phase of “cooked”, but the systems with 10 planets have not yet been unstable after millions of years. The more prosperous systems were also found that most planets throw most of their planets, because millions of years lost 70 percent. Most of the earnings are lower masses, as expected.
The obvious question is, well, what happens us, Then? Our solar system has eight main planets and has been around for more than four million years. May the system be unstable after a billion years, do we safely past? Why are we still around?
We could be lucky. That’s possible. The published groups are averages of many simulations, so some systems lose more planets than others. It could be that the simulations of researchers will be incomplete and need to enter more parameters. It is likely that our solar systems will be long enough to be stable and, from here, we will be fine.
The group also found that astronomers match the number of free floating planets perceived, as all the stars in the Galaxy must form an average of five to 10 planets. That’s a lot, but it’s not without the question. Some stars can have plenty of planets, and some only complete a few (or none). Trappist-1, for example, is low mass dwarf star, and Has at least seven ground planets! Red dwarfs are the most common types of stars in the universe, so we will only see the low Mash-Low planets we see. Stars like sun can throw a lot of planets, but only 10 percent of all stars are. So it’s a molehill compared to the mountain of red dwarf.
This work is still pre-, and many remains to explore. The numbers come quite well with observations, giving good reasons, giving good reasons to suspect that there are more planets later than those who can orbit the stars.
How many of them once rolled our sun? How many animal planets do we have lost? None? One? Four? We will probably never know; The 4.6 million year old history of the solar system offers a long time to throw the world’s milk path. But it could be very well when the galactic nomades began his endless journey around our sun. If so, they have a lot of companies.
