What Is a Spiral Galaxy?

A spiral galaxy (Spiral Galaxy) is a flat galaxy with spiral arms formed by a large amount of gas, dust, and hot and bright stars. Spiral galaxies are spiral galaxies and are represented by S in Hubble's classification of galaxies.

Spiral galaxy

The name of the spiral galaxy comes from the logarithmic spiral outward from the nucleus.

There is a relatively large total angular momentum structure with a nucleus in the center, surrounded by the surrounding galaxy disk.

Spiral galaxies can be divided into normal spiral galaxies and

For the exploration of the universe, humans have never stopped, and finding another planet suitable for human habitation has been a goal that humans have been pursuing for decades. Among them, the United States

On January 9, 2016, NASA issued a

Astronomers have made great gains in distant space. The largest spiral galaxy has been discovered so far (January 2013). It is shocking that it has just formed and may become larger in the future. ^[3]

According to foreign media reports, astronomers named the galaxy NGC6872, which has been identified as the largest known spiral galaxy. It is estimated that its span exceeds 522,000 light years, which is more than five times larger than the Milky Way. ^[3]

A team of researchers from Brazil, Chile, and the United States discovered it. After analysis, they believe that NGC6872 is just a newly formed galaxy and it will continue to grow. "This is the largest galaxy we have discovered so far. Its span is even more than 500,000 light-years, and it is also a very young galaxy. It will become a hot star in the universe in the future," said Raphael. . " ^[3]

As early as October 2012, scientists discovered a huge galaxy, did researchers number it A2261-BCG, and its span reached 10,000 light-years. At that time, it was identified as the largest galaxy, but this record was only half a year later. Is broken. ^[3]