NGC 604

NGC 604 is region of star formation inside the Triangulum Galaxy, an estimated 2.7 million light-years away. It’s huge, roughly 1,520 light-years across which makes it over 40 times the size of the visible portion of the Orion Nebula near us in the Milky Way. It’s also incredibly bright. If it were as close to us as the Orion Nebula, it would outshine Venus.

Image Credit: NASA

Old Lace

M33radio_opt_largeThis combined image of radio and visible light observations of the faint galaxy known as M33 looks like lace hanging in the sky. Also known as the Triangulum Galaxy, it is part of the Local Group of galaxies which includes the Andromeda Galaxy and the Milky Way. M33 is over thirty thousand light years across and more than two million light years away. The optical data in this image (mostly white) show the many stars within the galaxy as well as reddish star forming regions that are filled with hot hydrogen gas. The radio data (colored pink) from the Very Large Array (VLA) reveal the cooler hydrogen gas in the galaxy, gas which cannot be seen with an optical telescope. Mergedr, the radio and optical images show a more comprehensive view of star formation in this galaxy.

Image Credit: NRAO