The largest objects in the Universe
The universe is huge. We find it difficult to imagine its true dimensions. Scientists say that since the Big Bang it has grown so much that it has virtually no edge. We can not see the entire universe, but those of its place, which are open to our gaze, too, contain a lot of secrets, mysteries and other unusual things. In the past, we wrote about the biggest structural objects in the universe. Today let's talk about the single, starting from the largest asteroid and ending with the largest galaxy in the visible space of our cosmos.
Help: One light year - a unit of measurement of distance in astronomy, which is equal to the distance light travels in one Earth year in a vacuum.
The largest asteroid in the Solar System
Previously, the largest asteroid Ceres, the solar system is. The diameter of the object is approximately 950 kilometers. The second largest was considered Pallas with a diameter of 512 kilometers. A West took third place of the largest known asteroid of the solar system, second in size Pallas, but ahead of it by weight.
After Ceres scientists moved into the category of dwarf planets, Pallas began to occupy the top spot the biggest (in size) of asteroids in the Solar System. However, astronomers have refined the size of Vesta, and it turned out that it is more of Pallas. The diameter of Vesta is 530 kilometers. Thus, the West has become not only the biggest but also the most massive asteroid in our solar system.
See also: the universe finite or infinite?
The largest satellite of the planet in the Solar System
Comparative size of Ganymede with other satellites of the solar system and Earth Satellite gas giant Jupiter Ganimed is the largest satellite in the solar system. Its diameter is 5268 km.
Ganymede is one of the four largest satellites of Jupiter, which, along with Io, Europa and Callisto opened the first Italian mathematician, philosopher and astronomer Galileo Galilei. Ganymede name until the mid 20th century was not used. Galileo called them open satellites' Medici planets ", and the Ganymede - Jupiter III or" third satellite of Jupiter ".
Scientists believe that beneath the surface of Ganymede have a huge ocean, water which contains much more than on Earth.
See also: Scientists describe the approximate location of Jupiter Birthday
The largest satellite of exoplanets
The star WASP-12, located at a distance of 870 light-years away, is the exoplanet WASP-12b. Recall that called exoplanets planets that are outside the solar system.
In 2012, WASP-12b planet explored by Russian scientists. They suggested that it has a moon. This possibility has been based on an analysis of the luminance (brightness) of the star. The peculiarities of the brightness variation can be calculated what proportion of the disk space stars satellite covers. Scientists believe that the satellite has a radius of 0, 57 Jupiter radius (is it in 6, 4 times the size of the Earth). Such a high resolution and allowed to assume the existence of the satellite.
The largest planet in the solar system,
With a diameter of 142,984 kilometers of Jupiter is the largest planet of the solar system. Along with Saturn, Uranus and Neptune, Jupiter is classified as a gas giant. Jupiter's mass is 318 times the mass of Earth. He is 2, 5 times heavier than all the other planets of the Solar system combined. Giant is located at a distance of 770 million kilometers from the Sun, and makes a complete revolution around the world in about 11, 9 Earth year.
Perhaps the most famous of Jupiter's feature is its Great Red Spot (BCP) - Hurricane, which continues on the planet for over 300 years. Diameter of the spot diameter of Earth.
The biggest rocky exoplanet
The artistic representation of the planet BD + 20594 b
The biggest rocky exoplanet was discovered Space Telescope, "Kepler" in 2016 in the constellation of Aries, which is 500 light years from us. Object, designated BD + 20594b, harder earth about 16 times and has a radius of 2, 2 times larger than the Earth.
Previously, the biggest rocky exoplanet considered Kepler-10C. Studies say that this planet has a radius which is 2, 35 times larger than the Earth, and its mass is about 17 more than the Earth. However, more accurate calculations carried out in 2017, revealed that the planet Kepler-10c is only 7, 4 times heavier than Earth, and its composition is closer to the gas giant.
The largest gas giant solar system is
Determine the largest exoplanet class gas gignat - not an easy task. Scientists need to consider many things. For example, there are objects in space are so vast that they can hardly be called planets. They are more like a star. At the same time, their mass is less than the minimum required to maintain the nuclear reaction of hydrogen combustion and conversion of a star. Such objects are called substellar. Presumably the largest exoplanet class gas giant among detected at this point is HD 100546 b, discovered in 2013. It is located 337 light years from Earth. Scientists believe that HD 100546 b 6, 9 times larger and 20 times the mass of Jupiter.
The biggest star in the universe
At present, the biggest star, not only in our Milky Way galaxy, but in the known universe is red hypergiants UY Shield. It is located about 9500 light-years away. According to scientists, UY Shield radius is the radius of the Sun in 1708, but it is constantly changing and can be up to 2100 solar radii. The diameter of the star is 2, 4 billion kilometers.
The size of our sun and stars UY Shield (with a magnification of 7 times)
For understanding: if the sun to draw a small circle with a diameter of 1 mm, then UY Shield circle will need a diameter of 1, 7-2, 1 meter! If UY shield placed at the center of the solar system, then its photosphere (emission layer stellar atmosphere) cover orbit Jupiter.
According to current estimates of astronomers, star UY Shield 340 000 times brighter than our sun.
See also: Scientists have told us at some planets have a chance to survive the death of its star
The biggest black hole
If you believe this information here, about 17 billion light-years away, towards the constellation of Virgo, is to quasar is presumably the most massive black hole in the known universe. The object is a very complicated name SDSS J140821.67 + 025733.2.
SDSS J140821 mass of an object easily elevates him to the rank ultramassivnyh black holes. The value of this parameter is almost 3 times greater than the mass to lead to this black hole ultramassivnoy quasar TON 618, whose figure is 66 billion suns wt. new leader weighs 196 billion solar masses. Its diameter - 1, 17 trillion kilometers. This is more than 98 times the diameter of Pluto in the solar system. By the way, recently, scientists have proposed the idea of explaining how these supermassive black holes in general could appear in the universe.
See also: 10 scientific facts, which we have learned from the first photos of a black hole
The biggest galaxies in the universe
The biggest in size (but not by weight) of galaxies in the observable universe is a galaxy with maloprimetnym called IC 1101. Its diameter is about 6 million light-years. In other words, to cover the distance from one end thereof to the other, the light requires 6 million years. Its size IC 1101 is obliged to numerous clashes with the much smaller galaxies.
The galaxy IC 1101 is located about one billion light-years away. It contains about 100 trillion stars. For comparison, our Milky Way galaxy may contain from 200 to 400 billion stars.
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