Anyone who is interested in space, asked himself the question, how many solar systems are in our galaxy? The Milky Way, the so-called our Galaxy, according to approximate calculations, consists of an incredible number of celestial bodies. Many of them are united in groups like ours.
What is a galaxy?
The Milky Way is shaped like a spiral with a jumper. All the stars in its space, revolve around the core, like the sun. The star will make a complete revolution in 200 million years. Our neighbors in outer space are the Andromeda Nebula, and the Triangle Galaxy - astronomers combine them into a group called the Virgo supercluster. In addition to large galaxies, the group goes a lot of dwarf. Their gravitational fields are weaker, so they are attracted to larger neighbors.
Interesting to know! The unit of measurement of the distance between objects in space is the light year. It is equal to the distance that a ray of light travels in 365 days. Scientists believe that the universe surrounding our planet extends 93 billion light years from Earth.
The sun is the center of the planetary system, around which 8 celestial bodies rotate. This is because the mass of the star is very large and creates a strong gravitational pull. The solar system consists not only of planets, but other space objects rotating around its center. For many years of observation, our star system has been studied relatively well. However, other clusters of planets are at distances that cannot be overcome. And they all relate to the Milky Way.
Outer space near us.
The answer to the question of how many solar systems are in the galaxy is quite simple - one. Only our Planetary System is called Solar. But inside the little-studied Galaxy, there are a great many objects with a gravitational center.
Until the end of the 20th century, scientists could not determine the presence of these celestial clusters. The first planet that exists outside our system was discovered only in 1988. Such space bodies were given the name of exoplanets.
Today, in view of technological progress, scientists know more than 1000 planetary clusters. And these are not final figures, astronomers from all over the world are daily exploring the expanses of space to discover new exoplanets. According to the assumptions, within the framework of the Milky Way there may be about 200-400 billion.
In the future, it is more interesting to find out, not how many solar systems are in our Galaxy, but how many planetary clusters exist within the Milky Way. After all, its diameter, according to approximate estimates, is 100,000 light years. Perhaps on some exoplanets life will be discovered.
The universe is huge if light travels these distances for millions of years. Humanity must make a leap in science in order to travel between the stars. It must be something new. But for now, for us, a flight to the moon is already an achievement.
Before answering the question: in what galaxy is the Solar System, it is necessary to clearly distinguish between the usually confusing concepts: the planetary system and the star system.
The property of matter to stick together in whom, it is well known - its particles naturally attract each other. And the stronger this trend, the higher the speed of rotation of the emerging mass.
There is a whirlpool effect (or whirligig - but flattened to the state of a flat disk). The phenomenon is vividly illustrated by photographs of cyclones above the surface of the planet: a dense center and disheveled, spiralically twisting to the middle of the sleeve.
The same is observed in the planetary and stellar systems. But in the first one, the mass of matter is much less and is already "molded" into tight "lumps" of planets. The second is more loose in structure, but it includes billions of star bodies (each with its own planets). And if the planetary system is compared with the family, then the galaxy is already a state.
A speck of dust in a whirlwind of stars.
In one of such spirally twisted "states", a speck of dust, tiny in scope of the universe, rotates with its planetary "family" our Sun. It is located on the far edge, in one of the highly sparse arms of the Milky Way Galaxy. The name comes from the band in the sky, where the stars are "poured" so thick that they resemble spilled milk. This is a view of our galaxy in profile - a cross section of a disk of stars visible from the edge. Residents of another such "empire", observing it from above, will find similarities with a flat "fire wheel" lying flat or a flat spiral with several sleeves flying as a result of rotation.
The answer to the question: in which galaxy the Earth is drawn together with the Sun will be: The Milky Way. But to call our planetary system the galaxy is a mistake.
A year on Mars does not last 365 days, as on Earth. Seasons are also measured differently. What caused such differences, and what influenced such phenomena - will be considered in the article.
The duration of the Martian year.
Mars is a fascinating object of particular interest to scientists for many decades. To some extent, it reminds humanity of our home planet. Therefore, it is possible that in a short time, humans will be able to use it as a second home. However, this will have to adapt to the new rhythm and take into account the fact that not only temperature, pressure, and gravity differ from the Earth, but also the year on Mars.
One annual period on the "red planet" is 1.88 years or 686.98 Earth days. In 2017 there was a transition of this space object to the solar longitude. At the same time he happened to meet the vernal equinox, which occurred on May 5. This day was the beginning of a new period on Mars. Spring reigns on Earth at this time, and the countdown of the new calendar year begins in the winter time - January 1, but not at all on May 5.
What influenced the length of the year?
The year on Mars has other seasons in duration and lasts almost twice as long. This phenomenon can be explained by several circumstances. On the planet, like us, there are 4 seasons. However, the eccentricity of the orbit path creates differences and makes them different from earth records. Orbital speed is dynamic and unstable. Observed its changes, comes from the distance to the Sun.
The greatest slowness is characteristic of aphelion. In the case of perihelion, the planet, on the contrary, begins to behave in an accelerated mode. As a result, the duration of all seasons is twice as long as on planet Earth. In the period of perihelion, as practice shows, the Sun radiates energy by 40% more than in all other time periods. This suggests that other Martian indicators do not converge with the planet Earth.
Thus, now it will not be difficult to answer the question of how long one year on Mars lasts, and how much it differs from Earth. The knowledge gained will help in the process of mastering other space objects and comparing their basic parameters and characteristics. Indeed, in the Solar system and beyond it, there are many planets with more "rigid" and "stretched" time frames ...