The universe was only 300 million years old when the galaxy GLASS-z13 was born.
REPUBLIKA.CO.ID, JAKARTA – Currently, not even a month has passed for the James Webb Space Telescope to make scientific observations. A group of researchers confirms that Webb has captured the oldest galaxy ever observed.
reported from earth sky, tThese findings are revealed in a new report that is still ongoing. peer review and published in arXiv On July 20, 2022. The universe was only 300 million years old when the galaxy, known as GLASS-z13, first appeared. Keep in mind that the speed of light is constant. Therefore, when we observe objects from other parts of the universe, we return to the time when their light left them.
Light from distant galaxies is pushed toward the red end of the electromagnetic spectrum as it travels across space and time over billions of years. The letter “z” is represented by scientists as the number of redshift.
The most distant galaxies in our universe known before Webb are GN-z11 and HD1. The GN-z11’s redshift factor, or “z”, as the name suggests, is 11.
According to scientists, the galaxy was formed in the universe about 400 million years old. However, the HD1 only held the record for a short time when it was discovered in April. Today, it appears that GLASS-z13 existed about 30 million years before HD1.
galaxies old and young
Apart from GLASSz-13, other distant galaxies are being investigated by scientists. Also, they’re investigating GLASSz-11, which is claimed to be one of the first galaxies we’ve ever seen. Compared to galaxies we can see today, such as the Milky Way, both of these galaxies are smaller in size.
The diameter of the Milky Way is about 100,000 light years. Meanwhile, the diameters of GLASSz-13 and GLASSz-11 are 1,600 and 2,300 light-years, respectively.
There are 100 to 400 billion stars in the Milky Way Galaxy. Looking at GLASSz-13, the researchers found GLASSz-11. Both galaxies are visible in the same direction in space.