Astronomy Picture of the Day NGC 7822: Stars and Dust Pillars in Infrared
Image Credit: WISE, IRSA, NASA; Processing & Copyright : Francesco Antonucci
Explanation: Young stars themselves are clearing out their nursery in NGC 7822. Within the nebula, bright edges and complex dust sculptures dominate this detailed skyscape taken in infrared light by NASA's Wide Field Infrared Survey Explorer (WISE) satellite. NGC 7822 lies at the edge of a giant molecular cloud toward the northern constellation Cepheus, a glowing star forming region that lies about 3,000 light-years away. The atomic emission of light by the nebula's gas is powered by energetic radiation from the hot stars, whose powerful winds and light also sculpt and erode the denser pillar shapes. Stars could still be forming inside the pillars by gravitational collapse, but as the pillars are eroded away, any forming stars will ultimately be cut off from their reservoir of star stuff. This field spans around 40 light-years at the estimated distance of NGC 7822. #nasa#hubble#space#science#astronomy#universe#telescope#cosmos#tbt#throwbackthursday#galaxythe#juno#jupiter#photography#timelapse#earthfromspace#meteor#fireball#makeawish#curiosity#curiosità#astronomia#l4l#universo#cosmo#star#stelle#selfie#mars#marte
I will never get over the fact that @nasa sent Jupiter’s wife to check on him. #ScienceRules#MythologyNerd#NASAYouFunny#Repost @nasa
On its eighth flyby of Jupiter, our Juno spacecraft caught this striking view of the gas giant planet. Taken on Sept. 1, 2017, Juno was soaring 4,707 miles (7,576 km) from the tops of the planet's clouds in this view.
Juno is currently at Jupiter to understand the origin and evolution of the planet. Underneath its dense cloud cover, Jupiter safeguards secrets to the fundamental processes and conditions that governed our solar system during its formation. As our primary example of a giant planet, Jupiter can also provide critical knowledge for understanding the planetary systems being discovered around other stars.
With its suite of science instruments, Juno will investigate the existence of a solid planetary core, map Jupiter's intense magnetic field, measure the amount of water and ammonia in the deep atmosphere, and observe the planet's auroras. Juno will let us take a giant step forward in our understanding of how giant planets form and the role these titans played in putting together the rest of the solar system.
Image Credits: NASA/JPL-Caltech/SwRI/MSSS/Gerald Eichstädt
there was this star that, by all known theories of stellar evolution (the study of how stars are born, live and die), should have died. Many stories in the media lately have described this star as the “Zombie” star since, contrary to what should have happened –that it should have died, it came back to life much like a “zombie”. It is, by all accounts, the astronomical analog of a horror film character: a star that just wouldn’t stay dead.
Located in the constellation of Ursa Major, The Great Bear, astronomers first detected a supernova outburst in a distant galaxy (see discovery image above), an object so distant that its light we see today left it long before the Age of the Dinosaurs began, about 500 million years ago.
The “Zombie Star” is a rare type of supernova and is located on the sky in the constellation of Ursa Major at the location indicated by the white star.
All stars produce energy by changing lighter elements into heavier elements. This process begins in all cases with four hydrogen atoms being converted into one helium atom and continues throughout the star’s lifetime, ending when most of the hydrogen in the star’s core has been consumed. In the case of stars like our sun, using the helium that has built up during the star’s “normal” lifetime, the process continues its energy production, producing carbon and oxygen as byproducts. Stars are thus huge elemental factories, the only sources of heavier elements, the elements necessary for new planets and life itself. It is often said and is quite true that we are all made of star stuff; this sentiment is quite prosaic but also, quite true....
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