A protoplanetary nebula or preplanetary nebula (PPN, plural PPNe) is an astronomical object which is at the short-lived episode during a star's rapid evolution...

nebula. Protoplanetary disc AS 209 nestled in the young Ophiuchus star-forming region. Protoplanetary disk HH 212. By observing dusty protoplanetary discs...

The Red Rectangle Nebula, so called because of its red color and unique rectangular shape, is a protoplanetary nebula in the Monoceros constellation....

Rectangle Nebula, an example of a protoplanetary nebula. The delicate shell of SNR B0509-67.5 Tycho Supernova remnant in X-ray light Southern Ring Nebula, Planetary...

Westbrook Nebula (CRL 618) is a bipolar protoplanetary nebula which is located in the constellation Auriga. It is being formed by a star that has passed...

The Egg Nebula (also known as RAFGL 2688 and CRL 2688) is a bipolar protoplanetary nebula approximately 3,000 light-years away from Earth. Its peculiar...

gas and dust. Astronomers have directly observed protoplanetary disks and brown dwarfs within the nebula, intense and turbulent motions of the gas, and...

The Calabash Nebula, also known as the Rotten Egg Nebula or by its technical name OH 231.84 +4.22, is a protoplanetary nebula (PPN) 1.4 light years (13...

(DUst-Prominent Longitudinally-EXtended) protoplanetary nebula. The spherical ring structures around the nebula were created throughout the asymptotic giant...

The Boomerang Nebula (canonical name ) is a pulsar-wind bipolar reflection nebula located approximately 5,000 light-years from Earth in the constellation...

This is a list of protoplanetary nebulae. These objects represent the final stage before a planetary nebula. During this stage, the red giant star begins...

contains more carbon than oxygen Protoplanetary nebula – Nebula surrounding a dying star Planetary nebula – Type of emission nebula created by dying red giants...

Orion Nebula Ricci, L.; et al. (2008). "The Hubble Space Telescope/Advanced Camera for Surveys Atlas of Protoplanetary Disks in the Great Orion Nebula". Astronomical...

IRAS 19024+0044, also known informally as the Starfish Nebula, is a large protoplanetary nebula that is located in the constellation Aquila at a distance...

Low-Ionization Emission Region Nova remnant PG 1159 star (predegenerates) Protoplanetary nebula Supernova remnant White dwarf List of planetary nebulae Osterbrock...

years to form, with the protoplanetary disk evolving into a planetary system over the next 10–100 million years. The protoplanetary disk is an accretion...

these wavelengths. Emission nebula Reflection nebula Astronomical object H I region Planetary nebula Protoplanetary nebula Astronomical spectroscopy Interstellar...

IRAS 20068+4051 is a protoplanetary nebula in the constellation Cygnus. It has not yet become a complete planetary nebula, and it is still in the short-lived...

grapes, a sweet hybrid variety of table grape Cotton Candy Nebula, a protoplanetary nebula' Candyfloss (novel), a novel by Jacqueline Wilson Candy Floss...

The Red Square Nebula is a celestial object located in the area of the sky occupied by star MWC 922 in the constellation Serpens. The first images of this...

the Sun's larger gravity. It includes fission in a protoplanetary nebula and excludes a solar nebula. Agglomerations of floccules, which are presumed to...

Pedunculopontine nucleus Principal protected note, an investment contract Protoplanetary nebula Parameterized post-Newtonian formalism, for calculations on gravity...

Roberts 22 is a protoplanetary nebula in the southern constellation Carina, located about 2,000 parsecs (6,500 lightyears) from Earth. A 12th magnitude...

Owl Nebula in Ursa Major. It was discovered by William Herschel in 1788. NGC 6751, also known as the Glowing Eye, is a planetary nebula. The nebula is...

Nebula was Like a Blender". The Planetary Society. Retrieved 2007-01-02. B. G. Elmegreen (1979). "On the disruption of a protoplanetary disc nebula by...

J22053028+5321327, is a protoplanetary nebula located in the constellation Cepheus at approximately ~6,500 light-years from Earth. The nebula was created by the...

thought to be a protoplanetary nebula with the central star too cool to ionize any of the gas, but it is now known to be a planetary nebula in the earliest...

it. The most famous region containing photoevaporated protoplanetary disks is the Orion Nebula. They were called bright proplyds and since then the term...

The Frosty Leo Nebula is a protoplanetary nebula (PPN) located roughly at 3000 light-years away from Earth in the direction of the constellation Leo....

The Water Lily Nebula, in the southern constellation of Ara, is a pre-planetary nebula also known as IRAS 16594-4656, in the process of developing to...