Galactic Center
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The Galactic Center is the barycenter of the Milky Way and a corresponding point on the rotational axis of the galaxy. Its central massive object is a supermassive black hole of about 4 million solar
The Galactic Center, as seen by one of the 2MASS infrared telescopes, is located in the bright upper left portion of the image.
There is a supermassive black hole in the bright white area to the right of the center of this wide (scrollable) image. This composite photograph covers about half of a degree.
The Galactic Center of the Milky Way and a meteor
Composite labeled image
Sun
Videos
The Sun is the star located at the centre of the Solar System. It is a massive sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surf
Galactic Center
…interferometry) measured the diameter of Sagittarius A* to be 44 million kilometres (~0.294 AU). For comparison, the radius of Earth's orbit around the Sun is about 150 million kilometres (1.0 AU), whereas the distance of Mercury from the Sun at closest approach (perihelion) is 46 million kilometres (~0.307…
The Sun as viewed through a clear solar filter
The photosphere is structured by convection cells referred to as granules.
The Sun's transition region taken by Hinode's Solar Optical Telescope
During a total solar eclipse the solar corona can be seen with the naked eye.