... The Ring Nebula image selected for one of the stamps was the first new HST image to be obtained under the Hubble Heritage Program , and I had the privilege of being Principal Investigator for this observation. ...
... view of SN 1987A environment and the first measurements of the collision of SN 1987A ejecta with its inner circumstellar ring, (3) the observations of planetary nebulae that have revealed new aspects of stellar evolution and wonders of hydrodynamics, and ...
... In this way we have derived an absolute size of the ring R abs = (6.23 0.08) 10 17 cm and an angular size R" = 808 17 mas, which give a distance to the supernova d(SN 1987A) = 51.4 1.2 kpc and a distance modulus m-M(SN 1987A)=18.55 0.05. ...
... Directions to Space Telescope Science Institute 83 N 83 y y swa ress xr E Ep a a F lls o es J ne 695 University Pkwy ring Lane Cold Sp la d olan R Ave nue · From the North · Travel south on I-83. ...
... Authors: Howard E. Bond I list the 16 planetary nebulae (PNe) known to contain close-binary nuclei, and show that the nebulae generally have axisymmetric structures, including elliptical, bipolar, or ring morphologies. ...
... 1 G. Verdoes Kleijn, 1,3 N. J. Turner 4 We present broad- and narrow-band WFPC2 images of the nuclear dust disks and rings of five low- z elliptical galaxies hosting 3C radio sources: NGC 383 (3C 31)/NGC 382, NGC 3862 (3C 264), NGC 4261 (3C 270), UGC ...
... Rings and Small Moons) The WF/PC-2 was used to continue the long-term survey of ... the rings from their nearly edge-on aspect, just after the most recent ring plane ...