dec 022012
Anne's Picture of the Day: Herbig Haro object HH 47

December 2, 2012 Herbig Haro object HH 47, a stellar jet in Vela Image Credit: J. Morse/STScI, and NASA/ESA Herbig Haro object HH 47 is a bipolar stellar jet of 4.83 trillion kilometers long and 10 times the width of our Solar System located at the edge of the Gum Nebula, about 1140 light-years away [continue reading]

nov 112012
Anne's Picture of the Day: Herbig-Haro 32

November 11, 2012 Herbig-Haro 32, a bright Herbig–Haro object in Aquila Image Credit: NASA and The Hubble Heritage Team (AURA/STScI) Herbig-Haro 32 (HH 32) is a bright Herbig–Haro object located some 960 light-years away in the constellation of Aquila. A Herbig-Haro object is a small bright nebula in a star-forming region, created when jets of [continue reading]

aug 112012
Hidden Galactic Nuclei

  At the core of most galaxies including our own Milky Way is a supermassive black hole. Material falling into the environment of the black hole heats up, and can radiate dramatically, sometimes also powering the ejection of bipolar jets of rapidly moving charged particles. These so-called active galactic nuclei (AGN) are observed to have [continue reading]

mei 262012
The Anatomy of a Stellar Outflow

  Astronomers used to think that star formation simply involved the gradual coalescence of material under the influence of gravity. No longer.  A Hubble image of a jet of emission from a young star (Herbig-Haro 111). A new paper reports that infrared spectra of a jet has uncovered a rich trove of diagnostic emission lines [continue reading]