Wise Observatory

Looking at M33 with the C28 (last night's images, before the clouds closed us down). This is a false color combination of ONE L (luminance) image exposed for 300 sec and ONE H-alpha image exposed for 1200 sec, where the scaled L image representing the continuum was subtracted from the H-alpha one yielding a net-H-alpha image. This was combined into the color composite with the L image, choosing red for L and blue-green for net-H-alpha. Note the much wider distribution of red, corresponding to stars that have left the spiral pattern, and the distribution of the blue-green HII regions that reach quite far from the "red" galaxy...

Big brother...

Kitt Peak National Observatory Kitt Peak National Observatory (KPNO), part of the National Optical Astronomy Observatory (NOAO), supports the most diverse collection of astronomical observatories on Earth for nighttime optical and infrared astronomy and daytime study of the Sun. Sharing the mountaintop site with the Natio

Image of the Orion nebula taken by Uri Malamud with the 40-inch telescope and the LAIWO mosaic CCD camera. This is a combination of three 180-sec exposures; one through V, one through R and the other I. The colors were obtained by coding I as "red", (R-I) as "green", and (V-I) as "blue".