- NASA’s Hubble Space Telescope has captured the galaxy NGC 5728. took an image of
- NGC 5728 is a Seyfert galaxy, which is ‘powered by its active core’.
- These galaxies have a significantly higher luminosity in the central region than the rest of the Milky Way, but NGC 5728 can be seen.
- Hubble used its Wide Field Camera 3 (WFC3) to take the photo
NASA’s Hubble Space Telescope has captured a remarkable image of a galaxy in deep space that has an active core, similar to the ‘Cosmic Eye’.
The galaxy, known as NGC 5728, is 130 million light-years away from Earth.
It appears to be a spiral galaxy, just like the Milky Way, but is actually a Seyfert galaxy, a type of galaxy ‘powered by its active core’. NASA statement.
These galaxies are part of the class of active galactic nuclei (AGNs), which have a much higher luminosity than the rest of the galactic light in the central region.
“Other types of AGNs, such as quasars, emit so much radiation that it is nearly impossible to observe the galaxy that contains them,” NASA said.
NASA’s Hubble Space Telescope has captured an image of the galaxy NGC 5728, 130 million light-years away from Earth. NGC 5728 is a Seyfert galaxy, which is ‘powered by its active core’.
However, NGC 5728 is clearly observable and, at optical and infrared wavelengths, it appears to be ‘fairly normal’, NASA explained.
The center of the NGC 5728 galaxy is emitting ‘huge amounts’ of light in different parts of the electromagnetic spectrum that the WFC3 camera can see, even if it is not near the dust surrounding the galaxy’s core.
Hubble used its Wide Field Camera 3 (WFC3) to take the photo.
The instrument has been responsible for other discoveries in recent memory, such as the discovery of a jet of blue gas that looks like a light-saber.
Hubble used its Wide Field Camera 3 (WFC3) to take the photo. Hubble is set to be replaced by the $10 billion James Webb telescope when it launches later this year
The Seifert galaxies are named after the American astronomer Carl K. Seifert, who first saw them in 1944.
There are two types: Type 1 Seyfert galaxies that have broad emission lines and Type 2 Seyfert galaxies, which have strong emission lines.
In August, Hubble’s WFC3 was responsible for releasing an image of a stellar nursery, AFGL 5180, 5,000 light-years from Earth.
Hubble, which has operated for more than 30 years, is set to be replaced by the $10 billion James Webb telescope when it launches later this year.
It will go into space from French Guiana on 18 December after several delays.
Since its launch in April 1990, Hubble has made more than 1.5 million observations of the universe, and published more than 18,000 scientific papers based on its data.
It orbits the Earth at a speed of about 17,000 mph (27,300kph) in low-Earth orbit, at an altitude of about 340 miles, slightly higher than the International Space Station.
The telescope is named after famed astronomer Edwin Hubble, who was born in Missouri in 1889 and discovered that the universe is expanding, as well as the rate at which it is doing so.
Scientists study the atmosphere of distant exoplanets using giant space satellites like Hubble
The positions of distant stars and their orbiting planets are often unlike anything we see in our atmosphere.
To understand these new worlds, and what they are made of, scientists need to be able to figure out what their atmospheres consist of.
They often do this using a telescope similar to NASA’s Hubble Telescope.
These giant satellites scan the sky and lock up exoplanets that may be of interest to NASA.
Here, the sensors on board perform different types of analysis.
One of the most important and useful is called absorption spectroscopy.
This form of analysis measures the light that is emanating from a planet’s atmosphere.
Each gas absorbs slightly different wavelengths of light, and when this happens a black line appears over the full spectrum.
These lines correspond to a very specific molecule, indicating its presence on the planet.
They are often called the Fraunhofer lines after the German astronomer and physicist who first discovered them in 1814.
By combining all the different wavelengths of light, scientists can determine all the chemicals that make up a planet’s atmosphere.
The key is that what is missing provides clues to find out what is present.
It is extremely important that this be done by space telescopes, because then the Earth’s atmosphere would interfere.
Absorption from chemicals in our atmosphere will skew the sample, which is why it’s important to study light before it has a chance to reach Earth.
It is often used to look for helium, sodium and even oxygen in exotic environments.
This diagram shows how light passing from a star and through the atmosphere of an exoplanet produces Fraunhofer lines that indicate the presence of major compounds such as sodium or helium.