Astronomy Picture of the Day . ... At the Sun's surface, sunspots are known to be dark, planet-sized regions of intense magnetic fields. ... In the Center of Spiral Galaxy M83 . ... What's happening at the center of spiral galaxy M83? ... M83, visible in the inset image on the upper left, is one of the closest spiral galaxies to our own Milky Way Galaxy and from a distance of 15 million light-years, appears to be relatively normal. ... Leonids from Leo . ... Is Leo leaking? ... M87 s Energetic Jet . ...