The Bug Nebula, NGC 6302, is one of the brightest and most extreme
planetary nebulae known.
The ESO's Very Large Telescope (VLT) has captured a beautiful image of
a planetary nebula known as NGC 7009, or the Saturn Nebula, as part of a wider study attempting to unravel the processes that give these vast cosmic clouds of dust and glowing gas their distinctive shape.
Not exact matches
That phase is called the proto -
planetary nebula, and is so short that only a few of these objects are
known.
As well as this black hole, Messier 15 is
known to house a
planetary nebula, Pease 1 [4]-- and it was the first globular
known to contain one of these objects [5].
Astronomers
know that while large stars can end their lives as violently cataclysmic supernovae, smaller stars end up as
planetary nebulae — colourful, glowing clouds of dust and gas.
Astronomers were thrilled when they first saw the Hubble images of the
planetary nebulas ngc 7027 and crl 2688, also
known as the Egg
nebula.
There are more than a thousand
known planetary nebulae, and few have the simple, spherical shape that would be expected from a solitary star expelling its outer layers in dying gasps.
The final stages of life for a star like our Sun result in the star blowing its outer layers out into the surrounding space, forming objects
known as
planetary nebulae in a wide range of beautiful and striking shapes.
One type of such
nebulae,
known as bipolar
planetary nebulae, create ghostly hourglass or butterfly shapes around their parent stars.
While astronomers now believe they
know how stellar winds can sculpt a
planetary nebula, much still escapes them.
When that happens, it briefly exhales an extraordinarily beautiful, complex puff of gas
known as a
planetary nebula.
This pretty
planetary nebula is found in the constellation of Vela and is also
known as the Eight - Burst
nebula.
The stellar corpses — highly dense objects
known as white dwarfs — were spotted inside a dense cloud of gas and dust
known as a
planetary nebula.
When the helium ignites, the outer layers of the star are blown off in huge clouds of gas and dust
known as
planetary nebulae.
This
planetary nebula,
known as NGC 650 or the Little Dumbbell, is about 2,500 light - years from Earth in the Perseus... view image
The gaseous clouds
known as
planetary nebulae are only superficially similar to other types of
nebulae.
As for most
planetary nebulae, the distance of M27 (and thus true dimension and intrinsic luminosity) is not very well
known.
There are more than 1,000
known planetary nebulae in the Galaxy, but more might be overlooked because of obscuration in the Milky Way region.
The Hubble telescope has spied a giant celestial «eye,»
known as
planetary nebula NGC 6751.
Low - to medium - mass stars, such as the sun, will eventually swell up into red giants, eventually shedding their outer layers into a ring
known as a
planetary nebula (early observers thought the
nebulae resembled planets such as Neptune and Uranus).
This
planetary nebula,
known as NGC 650 or the Little Dumbbell, is about 2,500 light - years from Earth in the Perseus constellation.