Space news (astrophysics: stellar nurseries; HII region N159) – 180,000 light-years from Earth deep within the Large Magellanic Cloud (LMC) –
The stunning Hubble Space Telescope image seen above shows the heart of a cosmic maelstrom, glowing gas, and dark dust deep within the Large Magellanic Cloud (LMC), one of many satellite galaxies of the Milky Way. This stormy region of space contains stellar nursery N159, an HII region over 150 light-years across with many hot young suns emitting intense ultraviolet radiation. Ultraviolet light causing nearby hydrogen gas to glow and torrential stellar winds carving ridges, arcs, and filaments out of surrounding gas and dust.
Early stages of star birth
Near the heart of this cosmic maelstrom lies the butterfly-shaped Papillon Nebula, a small, dense stellar object astronomers refer to as a High-Excitation Blob, they have linked to the early stages of the formation of a massive star. This region of space was first detected using Hubble Space Telescope’s Wide Field Planetary Camera 2 (WFPC2).
Nebula N159’s just south of the Tarantula Nebula (heic 1402), a star-forming region also imaged by Hubble’s WFPC2. Hidden within this region of space astronomers found several massive stars they’re currently studying looking for clues to the growth and evolution of the most massive stars in the galaxy. The image seen here was taken using the Hubble Space Telescope’s Advanced Camera for Surveys.
Tells astronomers a thing or two about star birth throughout the cosmos
Space news (astrophysics: irregular dwarf galaxies; the formation of new stars) – a lonely, undefined looking galaxy an estimated 4.2 million light-years from Earth, approximately 2.3 million light-years from Leo A –
Astronomers think the chaotic, unusual looking smaller island universe seen in the Hubble Space Telescope image here hasn’t merged with any other galaxies lately. Classified as an irregular dwarf galaxy, UGC 4879 has no obvious form and lacks the magnificent whirl of a spiral galaxy or the coherence of an elliptical. Approximately 1.36 million parsecs from Earth this lonely, wandering hermit of a galaxy is showing astronomers new, interesting things about star birth in the universe.
Spectral data of UGC 4879 indicates radial velocities for different sections of the galaxy, which could indicate the presence of a stellar disk. This lonely, isolated wanderer is studied closely and intensely by astronomers because of its history of few interactions with other galaxies. This isolation makes it less complicated to piece together its history of star birth and an ideal laboratory for study.
Study of UGC 4879 indicates during the first 4 billion years after the beginning of the universe new stars were being born at a pretty fast rate. The next nine billion years of relative inactivity followed by a recent starburst about 1 billion years ago is a puzzle for astronomers. They continue to study this hermit of a galaxy hoping to find out more about both its history and the complex riddles of sun birth across the cosmos.
Irregular galaxy NGC 1140 starbursts at same rate as larger Milky Way
Space news (July 29, 2015) – 60 million light-years away in constellation Eridanus
NASA space scientists recently viewed the dwarf galaxy NGC 1140 undergoing starburst, an intense, but brief period of star formation believed to be characteristic of the first galaxies born in the universe billions of years ago.
Astronomers estimate during this starburst NGC 1140 will spawn a star like Sol every year, but knowledge concerning possible star-forming rates during starburst is rudimentary at this point. The bright, blue-white regions in the image above indicate the presence of young stars made up primarily of hydrogen and helium and fewer heavy metals than stars like Sol.
NASA space scientists plan on studying this irregular galaxy to gather data and facts concerning the evolution of the first galaxies to appear in the universe. The first galaxies born in the universe are much more distant in space-time, than galaxies like NGC 140, and therefore much harder to study. Studying this starburst is an opportunity for space scientists to learn more about the first galaxies to appear in the universe, without having to make a 13.77 billion year trip to the beginning of spacetime.