Hua Feng slowly learned that the projection of the Milky Way in the sky is like a glittering river flowing in the sky, so it was called the Milky Way or Tianhe in ancient times, and the Milky Way can be seen all year round, but at the turn of summer and autumn, the brightest and most spectacular part of the Milky Way was seen.

The most critical point is that Sun Wukong told him that suspicious objects of different races have been detected coming to the earth, and one of them is in the direction of Sagittarius.

The main constellations through which the Milky Way passes are: Cygnus, Aquila, Fox, Sagittarius, Ophiuchus, Shield, Sagittarius, Scorpio, Celestial, Rectangular, Jackal, South Triangle, Compass, Fly, Southern Cross, Sail, Puttus, Monoli, Orion, Taurus, Gemini, Auriga, Perseus, Cassiopeia and Scorpio.

The Milky Way is different in light and dark in the sky, wide and narrow. The narrowest is only 4°~5°, and the widest is about 30°. For the Northern Hemisphere, the important symbol of the summer starry sky is the Milky Way, a band of light extending from the east-north horizon to the southern horizon, and the "Summer Triangle" composed of three bright stars, namely Vega and Cowherd on both sides of the Milky Way and Tianjin IV in the Milky Way.

In summer, the Milky Way stretches north from the east side of Scorpio to the sky, and is majestic and magnificent. But it can only be enjoyed in the wild without light interference (the ultimate visual magnitude is above 5.5). The Milky Way is dark in winter (in the constellations Orion and Canis Major), but in the sky you can see the bright constellation Orion, as well as the bright "Winter Triangle" of Sirius, Betelgeuse, and South River.

88 zodiac signs throughout the day:

Northern Arch Zodiac Constellations: Ursa Minor, Ursa Major, Cephalo, Cassiopeia, Dracon

Northern Celestial Constellations: Andromeda, Perseus, Hercules, Scorpion, Deer and Leopard, Fox, Auriga, Shepherd, Hound, Leo Minor, Coma, Lynx, Lyra, Cygnus, Sagittarius, Dolphin, Pegasus, Triangulum.

Zodiac signs: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius, Pisces.

Equatorial constellations: Pony, Canis Minor, Aquila, Ophiuchus, Serpentus, Hydra, Sextant, Monoli, Orion, Cetus.

Southern Celestial Constellations: Temple of Heaven, Celestial Swallow, Crane, Pigeon, Lepus, Furnace, Paintstand, Tube, Carving, Telescope, Microscope, Ruler, Compass, Clock, Mountain, Indian, Exoces, Swordfish, Fly, Scorpion, Cuckoo, Raven, Phoenix, Peacock, Hydra, Jackal, Canis Major, South Triangular, Southern Cross, Arcticus, South Corona, Boat Base, Stern Constellation, Compass, Reticule, Sail, Emeral, Centauri, Bojiang Seat, Shield Seat, Juju Seat.

One of the companion galaxies: the Large Magellanic Cloud

The Milky Way has two companion galaxies: the Large Magellanic Galaxy and the Small Magellanic Galaxy. The galaxies opposite the Milky Way are called extragalactic galaxies.

The Milky Way, the Andromeda Galaxy, and the Triangulum Galaxy are the main galaxies in the Local Group of galaxies, which in total contains about 50 galaxies, and the Local Group is part of the Virgo Supercluster.

The Milky Way is surrounded by a number of dwarf galaxies in the local group, the largest of which is the Large Magellanic Galaxy with a diameter of 21,000 light-years, and the smallest is the Ternal Dwarf Galaxy, the Draconid Dwarf Galaxy, and the Leon II Dwarf Galaxy, all of which are only 500 light-years in diameter. Other Milky Way systems orbit the Milky Herculid, with the closest being the Dwarf Canis Major, followed by the Sagittarius Dwarf Elliptical Galaxy, the Ursa Minor Dwarf Galaxy, the Auriga Dwarf Galaxy, the Sextant Dwarf Galaxy, the Celestial Furnace Dwarf Galaxy, and the Leo Dwarf Galaxy.

Magellan Nebula:

In January 2006, researchers reported that unexplained tilting of the disk of the Milky Way had been found to be ripples caused by disturbances in the large Magellanic galaxy surrounding the Milky Way. It is caused by vibrations of certain frequencies as they pass through the edge of the Milky Way.

These two galaxies have about 2% of the mass of the Milky Way and are not considered enough to affect the Milky Way. But with dark matter in mind, the movement of these two galaxies is enough to have an impact on the larger Milky Way. The effect on the Milky Way increased by a factor of 20 after the addition of dark matter, based on a computer model by Martin Weinberg of the University of Massachusetts Amherst. In his model, the distribution of dark matter extends from the disk of the Milky Way to all known planes, and the resulting model predicts that the impact of gravity will be amplified as the Magellanic Galaxy passes through the Milky Way.

At the 222nd meeting of the American Astronomical Society in June 2013, NASA [9]) unveiled the latest stunning images of the Large Magellanic Cloud (LMC) and the Magellanic Cloud (SMC) taken by the Swift probe, the highest-resolution space images ever made public by NASA. These first-of-its-kind high-definition images will help scientists further identify and study the stars, supernovae, and star cluster systems that exist in the two nebulae.

The images were taken from the ultraviolet optical telescope (UVTO) aboard the Swift probe, and NASA and astrophysicists from the Goddard Space Flight Center and the University of Pennsylvania collaborated to capture the two closest galaxies from various angles using the UV/optical telescope on the Swift satellite, and then stitched together tens of thousands of small photographs to create the sharpest image with a resolution of more than 160 million pixels, with a total capacity of 457MB, in TIFF format.

The original image of the Large Magellanic Nebula was 160 million pixels and was stitched together from 2,200 partial photographs that took 5.4 days to take. The original image of the Magellanic Nebula, on the other hand, had a pixel count of 57 million pixels, consisted of 656 partial photographs, and took a total of 1.8 days to shoot.

Magellan Nebula Scale:

According to NASA's official information, the Large Magellanic Cloud and the Small Magellanic Cloud are both large celestial systems closest to our Milky Way and belong to the companion galaxy of the Milky Way. Among them, the Large Magellanic Cloud is about 163,000 light-years away from the Milky Way, its scale is about 20% of the Milky Way, and its mass is only equivalent to 2% of the Milky Way, while the Magellanic Cloud is about 200,000 light-years away from the Milky Way, and the mass is 50% of the Large Magellanic Cloud.

Origin of the Universe:

A galaxy with a galactic nucleus that runs at high speed in the universe, and when it catches up with another galaxy with a galactic nucleus, if the two are traveling at a similar speed, they will engulf each other, forming a larger galaxy.

If the nuclei of these two galaxies meet, they will circle each other to form a more massive nucleus that spins at high speed. This high-speed rotating galactic nucleus acts like a giant generator, bursting from its poles with powerful streams of particles that shoot into the distance. The greater the energy of the galactic nucleus, the greater the flow of ejected particles and the farther the ejection.

We call such galactic nuclei the bipolar jet nucleus. The core of a galaxy consumes its own energy when it ejects a stream of energetic particles, but it adds energy when it captures other clusters or galaxies. When the energy of the galactic nucleus changes from large to small, two thick jet bands are created.

If the magnetic axis of the galactic nucleus rotates around another axis called the axis of rotation of the galactic nucleus, the trajectory of the jet bend and evolve into the two spiral arms of a spiral galaxy.

In general, the larger the angle between the magnetic axis and the rotation axis of the galaxy nucleus (0~π/2), the flattened disk of the galaxy will be, otherwise it will be thicker.

The faster the magnetic axis of the galaxy nucleus rotates around its axis of rotation, the tighter the spiral arm will wrap around, otherwise, the looser it will be. The two spiral arms of spiral galaxies are active regions where stars are born.

Our Milky Way galaxy is a spiral galaxy – a barred spiral galaxy.

Mass Reduction:

When Alis Deaso

When the instrument that measures the mass of the Milky Way was recalibrated, it was discovered that the mass of the Milky Way had decreased. "We found that the mass of the Milky Way is only half of what is generally believed. ”Deaso

Say. She is an astronomer at the University of California, Santa Cruz, USA, and reported her measurements at the 221st meeting of the American Astronomical Society.

Measuring the mass of the Milky Way is complicated, in part because most of its mass comes from dark matter that cannot be seen. Scientists usually measure the rotation rate of galaxies and combine the results with the theory of the distribution of dark matter.

Using this method, the Harvard-Smithsonian Center for Astrophysics of Ma

K Reid and his team measured the total mass of the Milky Way, which is equivalent to trillions of times the mass of the Sun, and released it in 2009. However, Reid still said that "measuring the total mass of the Milky Way is very complex" and that there are many uncertainties.

Deaso

and her colleagues took a different approach. In their study, now published in the Monthly Bulletin of the Royal Astronomical Society, they are the first to search for stars very far from the center in the Milky Way halo – a sphere of light 1 billion light-years in diameter. Deaso

Explained, the diffusion velocity of these stars can reveal the mass of the Milky Way.

The results show that the mass of the Milky Way is "only" 500 billion ~ 1,000 billion times the mass of the Sun – less than half of Reid's previous measurements.

Deaso

As a reminder, this result is based on her assumptions about the size of the Milky Way's halo and the movement of stars around the center of the galaxy. However, she believes that these assumptions are all plausible and theoretically based.

Measuring the mass of the Milky Way "is important for understanding how the Milky Way formed and how galaxy clusters will develop over the next few billion years," Reid said. Because there is a gravitational attraction between galaxy clusters. "The best way to know the total mass of the Milky Way is to know the complete three-dimensional velocity of the galaxy cluster. He said.

Existing technology does not provide this information, but Deaso

It is hoped that the observations of larger telescopes will confirm her conclusions as soon as possible. "We need more stars farther from the center of the Milky Way. She said.

No matter what, life goes on, and the wheel of time never stops for anything.