Loving Astronomy

04/06/2019

APOD: Stephan's Quintet from Hubble (2019 Jun 03)
Image Credit: NASA, ESA, Hubble; Processing: Daniel Nobre
https://apod.nasa.gov/apod/ap190603.html

APOD: Stephan's Quintet from Hubble (2019 Jun 03)
Image Credit: NASA, ESA, Hubble; Processing: Daniel Nobre
https://apod.nasa.gov/apod/ap190603.html

Explanation: When did these big galaxies first begin to dance? Really only four of the five of Stephan's Quintet are locked in a cosmic tango of repeated close encounters taking place some 300 million light-years away. The odd galaxy out is easy to spot in this recently reprocessed image by the Hubble Space Telescope -- the interacting galaxies, NGC 7319, 7318B, 7318A, and 7317 (left to right), have a more dominant yellowish cast. They also tend to have distorted loops and tails, grown under the influence of disruptive gravitational tides. The mostly bluish galaxy, large NGC 7320 on the lower left, is in the foreground at about 40 million light-years distant, and so is not part of the interacting group. Data and modeling indicate that NGC 7318B is a relatively new intruder. A recently-discovered halo of old red stars surrounding Stephan's Quintet indicate that at least some of these galaxies started tangling over a billion years. Stephan's Quintet is visible with a moderate sized-telescope toward the constellation of Winged Horse (Pegasus).

https://www.nasa.gov/
https://www.esa.int/
https://www.nasa.gov/hubble
https://www.astrobin.com/users/Deep_Sky/

Starship Asterisk* • APOD Discussion Page
http://asterisk.apod.com/discuss_apod.php?date=190603

15/05/2019

Interesante

La ciencia experimental basa uno de sus pilares en las evidencias. Dichas evidencias pueden servir para detectar civilizaciones extraterrestres

22/09/2018

APOD: Window Seat over Hudson Bay (2018 Sep 22)
Image Credit & Copyright: Ralf Rohner
https://apod.nasa.gov/apod/ap180922.html

Explanation: On the August 18 night flight from San Francisco to Zurich, a window seat offered this tantalizing view when curtains of light draped a colorful glow across the sky over Hudson Bay. Constructed by digitally stacking six short exposures made with a hand held camera, the scene records the shimmering aurora borealis or northern lights just as the approaching high altitude sunrise illuminated the northeastern horizon. It also caught the flash of a Perseid meteor streaking beneath the handle stars of the Big Dipper of the north. A few days past the meteor shower's peak, its trail still points across the sky toward Perseus. Beautiful aurorae and shower meteors both occur in Earth's upper atmosphere at altitudes of 100 kilometers or so, far above commercial airline flights. The aurora are caused by energetic charged particles from the magnetosphere, while meteors are trails of comet dust.

https://ralf-rohner.pixels.com/

Starship Asterisk* • APOD Discussion Page
http://asterisk.apod.com/discuss_apod.php?date=180922

25/06/2018

APOD: Galaxy in a Crystal Ball (2018 Jun 22)
Image Credit & Copyright: Juan Carlos Munoz
https://apod.nasa.gov/apod/ap180622.html

Explanation: A small crystal ball seems to hold a whole galaxy in this creative snapshot. Of course, the galaxy is our own Milky Way. Its luminous central bulge marked by rifts of interstellar dust spans thousands of light-years. On this long southern hemisphere night it filled dark Chilean skies over Paranal Observatory. The single exposure image did not require a Very Large Telescope, though. Experiments with a digital camera on a tripod and crystal ball perched on a handrail outside the Paranal Residencia produced the evocative, cosmic marble portrait of our home galaxy.

https://twitter.com/astro_jcm/

Starship Asterisk* • APOD Discussion Page
http://asterisk.apod.com/discuss_apod.php?date=180622

22/07/2016

Loving this one!

APOD: NGC 1309: Spiral Galaxy and Friends (2016 Jul 14)
Image Credit: Hubble Legacy Archive, ESA, NASA;
Processing - Jeff Signorelli
http://apod.nasa.gov/apod/ap160714.html

Explanation: A gorgeous spiral galaxy some 100 million light-years distant, NGC 1309 lies on the banks of the constellation of the River (Eridanus). NGC 1309 spans about 30,000 light-years, making it about one third the size of our larger Milky Way galaxy. Bluish clusters of young stars and dust lanes are seen to trace out NGC 1309's spiral arms as they wind around an older yellowish star population at its core. Not just another pretty face-on spiral galaxy, observations of NGC 1309's recent supernova and Cepheid variable stars contribute to the calibration of the expansion of the Universe. Still, after you get over this beautiful galaxy's grand design, check out the array of more distant background galaxies also recorded in this sharp, reprocessed, Hubble Space Telescope view.

http://hla.stsci.edu/
http://www.esa.int/
http://www.nasa.gov/
http://www.skycrumbles.net/index.html

Starship Asterisk* • APOD Discussion Page
http://asterisk.apod.com/discuss_apod.php?date=160714