Skocz do zawartości

APOD - I kwartał 2017


Paether

Rekomendowane odpowiedzi

Gość Bellatrix

Zobaczcie: w obszarze tego Abell 2666 jest kilka mocno błękitnych słabych gwiazdek. Udało mi się odszukać w katalogach jedną z nich i się okazuje, że to gwiazda typu widmowego sdB (subdwarf). Spójrzcie jaka ona jest prześliczna i jak wyraźnie jej kolor odróżnia się od barwy reszty obiektów. Zapewne jest bardzo gorąca, podobnie jak HIP 107864.

 

post-29939-0-74101000-1489318867_thumb.png

post-29939-0-93175000-1489318870_thumb.png

Odnośnik do komentarza
Udostępnij na innych stronach

Szybkie gwiazdy i planety-łobuzy w Wielkiej Mgławicy Oriona

 

Fast Stars and Rogue Planets in the Orion Nebula

Start with the constellation of Orion. Below Orion's belt is a fuzzy area known as the Great Nebula of Orion. In this nebula is a bright star cluster known as the Trapezium, marked by four bright stars near the image center. The newly born stars in the Trapezium and surrounding regions show the Orion Nebula to be one of the most active areas of star formation to be found in our area of the Galaxy. In Orion, supernova explosions and close interactions between stars have created rogue planets and stars that rapidly move through space. Some of these fast stars have been found by comparing different images of this region taken by the Hubble Space Telescope many years apart. Many of the stars in the featured image, taken in visible and near-infrared light, appear unusually red because they are seen through dust that scatters away much of their blue light.

 

https://apod.nasa.gov/apod/image/1703/OrionTrapezium_Hubble_4699.jpg

OrionTrapezium_Hubble_960.jpg

  • Lubię 1
Odnośnik do komentarza
Udostępnij na innych stronach

Kometa, Sowa i galaktyka

The Comet, the Owl, and the Galaxy
Comet 41P/Tuttle-Giacobini-Kresak poses for a Messier moment in this telescopic snapshot from March 21. In fact it shares the 1 degree wide field-of-view with two well-known entries in the 18th century comet-hunting astronomer's famous catalog. Sweeping through northern springtime skies just below the Big Dipper, the faint greenish comet was about 75 light-seconds from our fair planet. Dusty, edge-on spiral galaxy Messier 108 (bottom center) is more like 45 million light-years away. At upper right, the planetary nebula with an aging but intensely hot central star, the owlish Messier 97 is only about 12 thousand light-years distant though, still well within our own Milky Way galaxy. Named for its discoverer and re-discoverers, this faint periodic comet was first sighted in 1858 and not again until 1907 and 1951. Matching orbit calculations indicated that the same comet had been observed at widely separated times. Nearing its best apparition and closest approach to Earth in over 100 years on April 1, comet 41P orbits the Sun with a period of about 5.4 years.

 

https://apod.nasa.gov/apod/image/1703/Comet41PM108M97Riu.jpg

Pozdrawiam

Comet41PM108M97Riu1024.jpg

Edytowane przez ekolog
Odnośnik do komentarza
Udostępnij na innych stronach

Cień Ganimedesa

Ganymede's Shadow
Approaching opposition early next month, Jupiter is offering some of its best telescopic views from planet Earth. On March 17, this impressively sharp image of the solar system's ruling gas giant was taken from a remote observatory in Chile. Bounded by planet girdling winds, familiar dark belts and light zones span the giant planet spotted with rotating oval storms. The solar system's largest moon Ganymede is above and left in the frame, its shadow seen in transit across the northern Jovian cloud tops. Ganymede itself is seen in remarkable detail along with bright surface features on fellow Galilean moon Io, right of Jupiter's looming disk.
Image Credit & Copyright: Damian Peach, Chilescope

Pełny rozmiar tutaj:
https://apod.nasa.gov/apod/image/1703/2017-03-17-0726_2-RGBdp.jpg

Pozdrawiam

APOD_25_03_2017.jpg

Edytowane przez ekolog
  • Lubię 3
Odnośnik do komentarza
Udostępnij na innych stronach

Czarna dziura pożerająca gwiazdę i emitująca dżet

 

Black Hole Accreting with Jet
What happens when a black hole devours a star? Many details remain unknown, but recent observations are providing new clues. In 2014, a powerful explosion was recorded by the ground-based robotic telescopes of the All Sky Automated Survey for SuperNovae (ASAS-SN) project, and followed up by instruments including NASA's Earth-orbiting Swift satellite. Computer modeling of these emissions fit a star being ripped apart by a distant supermassive black hole. The results of such a collision are portrayed in the featured artistic illustration. The black hole itself is a depicted as a tiny black dot in the center. As matter falls toward the hole, it collides with other matter and heats up. Surrounding the black hole is an accretion disk of hot matter that used to be the star, with a jet emanating from the black hole's spin axis.
Illustration Credit: NASA, Swift, Aurore Simonnet (Sonoma State U.)

Pełny rozmiar:
https://apod.nasa.gov/apod/image/1703/BlackHole_Simonnet_2491.jpg

Pozdrawiam

apod_blackhole.jpg

Edytowane przez ekolog
Odnośnik do komentarza
Udostępnij na innych stronach

Król Skrzydeł Hoodoo pod Drogą Mleczną

King of Wings Hoodoo under the Milky Way.
This rock structure is not only surreal -- it's real. The reason it's not more famous is that it is, perhaps, smaller than one might guess: the capstone rock overhangs only a few meters. Even so, the King of Wings outcrop, located in New Mexico, USA, is a fascinating example of an unusual type of rock structure called a hoodoo. Hoodoos may form when a layer of hard rock overlays a layer of eroding softer rock. Figuring out the details of incorporating this hoodoo into a night-sky photoshoot took over a year. Besides waiting for a suitably picturesque night behind a sky with few clouds, the foreground had to be artificially lit just right relative to the natural glow of the background. After much planning and waiting, the final shot, featured here, was taken in May 2016. Mimicking the horizontal bar, the background sky features the band of our Milky Way Galaxy stretching overhead.
Image Credit & Copyright: Wayne Pinkston (LightCrafter Photography)
Pełny rozmiar:
https://apod.nasa.gov/apod/image/1703/KingOfWings_Pinkston_7360.jpg

Pozdrawiam

p.s.

Pejczu wracaj :)

apod_28_3_2017.jpg

Odnośnik do komentarza
Udostępnij na innych stronach

Mgławica z wiązką laserową

Nebula with Laser Beams.
Four laser beams cut across this startling image of the Orion Nebula, as seen from ESO's Paranal Observatory in the Atacama desert on planet Earth. Not part of an interstellar conflict, the lasers are being used for an observation of Orion by UT4, one of the observatory's very large telescopes, in a technical test of an image-sharpening adaptive optics system. This view of the nebula with laser beams was captured by a small telescope from outside the UT4 enclosure. The beams are visible from that perspective because in the first few kilometers above the observatory the Earth's dense lower atmosphere scatters the laser light. The four small segments appearing beyond the beams are emission from an atmospheric layer of sodium atoms excited by the laser light at higher altitudes of 80-90 kilometers. Seen from the perspective of the UT4, those segments form bright spots or artificial guide stars. Their fluctuations are used in real-time to correct for atmospheric blurring along the line-of-sight by controlling a deformable mirror in the telescope's optical path.
Image Credit & Copyright: Stéphane Guisard (Los Cielos de America, TWAN)
Pełny rozmiar:
https://apod.nasa.gov/apod/image/1703/SGU-M42-4LGS-RC500-STL-RVB-1200x800-cp10.jpg

Pozdrawiam

apod_29_03_2017.jpg

Edytowane przez ekolog
Odnośnik do komentarza
Udostępnij na innych stronach

Młode gwiazdy i ciemne mgławice pyłowe w Byku

Young Stars and Dusty Nebulae in Taurus
Explanation: This complex of dusty nebulae lingers along the edge of the Taurus molecular cloud, a mere 450 light-years distant. Stars are forming on the cosmic scene. Composed from almost 40 hours of image data, the 2 degree wide telescopic field of view includes some youthful T-Tauri class stars embedded in the remnants of their natal clouds at the right. Millions of years old and still going through stellar adolescence, the stars are variable in brightness and in the late phases of their gravitational collapse. Their core temperatures will rise to sustain nuclear fusion as they grow into stable, low mass, main sequence stars, a stage of stellar evolution achieved by our middle-aged Sun about 4.5 billion years ago. Another youthful variable star, V1023 Tauri, can be spotted on the left. Within its yellowish dust cloud, it lies next to the striking blue reflection nebula Cederblad 30, also known as LBN 782. Just above the bright bluish reflection nebula is dusty dark nebula Barnard 7.
Image Credit & Copyright: Lloyd L. Smith, Deep Sky West
Pełny rozmiar:
https://apod.nasa.gov/apod/image/1703/LBN782ProcessedLRv1-2.jpg


Pozdrawiam

apod_30_3_2017.jpg

Odnośnik do komentarza
Udostępnij na innych stronach

Dołącz do dyskusji

Możesz dodać zawartość już teraz a zarejestrować się później. Jeśli posiadasz już konto, zaloguj się aby dodać zawartość za jego pomocą.

Gość
Dodaj odpowiedź do tematu...

×   Wklejono zawartość z formatowaniem.   Usuń formatowanie

  Dozwolonych jest tylko 75 emoji.

×   Odnośnik został automatycznie osadzony.   Przywróć wyświetlanie jako odnośnik

×   Przywrócono poprzednią zawartość.   Wyczyść edytor

×   Nie możesz bezpośrednio wkleić grafiki. Dodaj lub załącz grafiki z adresu URL.

×
×
  • Dodaj nową pozycję...

Powiadomienie o plikach cookie

Umieściliśmy na Twoim urządzeniu pliki cookie, aby pomóc Ci usprawnić przeglądanie strony. Możesz dostosować ustawienia plików cookie, w przeciwnym wypadku zakładamy, że wyrażasz na to zgodę.