Where is the Blue Snowball Nebula?
Caldwell 22, also cataloged as NGC 7662 and nicknamed the Snowball Nebula or Blue Snowball Nebula, is a planetary nebula located about 2,500 light-years from Earth.
How old is the Blue Snowball Nebula?
NGC 7662 is estimated to be between 2,000 and 4,000 light-years away and therefore has a spatially diameter between 0.35 and 0.70 light-years. The object is number 22 in the Caldwell catalogue….NGC 7662 Data Table.
| NGC | 7662 |
|---|---|
| Other Name | Snowball Nebula |
What is the smallest nebula in the Milky Way?
The smallest independent structures known today are Segue 1 and Segue 3. Only approximately 1000 stars are present in the entirety of dwarf galaxies Segue 1 and Segue 3,… [+]
What is meant by planetary nebula?
Definition of planetary nebula : a usually compact luminous ring-shaped nebula that is composed of matter which has been ejected from a hot star at its center.
How big is the Blue Snowball Nebula?
0.8 light yearsNGC 7662 / Radius
How big is a planetary nebula?
roughly one light year across
A typical planetary nebula is roughly one light year across, and consists of extremely rarefied gas, with a density generally from 100 to 10,000 particles per cm3.
Are dwarf galaxies common?
As those numbers suggest, dwarf galaxies are the most common type of galaxy in the universe. They outnumber giants like the Milky Way by a wide margin. But most of them probably formed in the early universe — the very first collections of stars. The galaxies were packed together tightly, so many of them began to merge.
What is the largest galaxy in the universe?
IC 1101
The biggest known galaxy is IC 1101, which is 50 times the Milky Way’s size and about 2,000 times more massive. It is about 5.5 million light-years across. Nebulas, or vast clouds of gas, also have impressively large sizes.
What is the difference between a supernova and a planetary nebula?
A planetary nebula is born when a low-mass star (less than around eight times the mass of the Sun) dies, while a supernova is the result of the death of a massive star.
Are planetary nebulae larger or smaller than emission nebulae?
Radiation from the hot white dwarf excites the expelled gases, producing emission nebulae with spectra similar to those of emission nebulae found in star formation regions. They are H II regions, because mostly hydrogen is ionized, but planetary are denser and more compact than nebulae found in star formation regions.
How far away is the the Blue Snowball Nebula?
1,800 light yearsNGC 7662 / Distance to Earth
What’s a massive star?
A massive star is a star that is larger than eight solar masses during its regular main sequence lifetime. Massive stars are born, just like average stars, out of clouds of dust called nebulae. A quick main sequence phase, where hydrogen continues to be fused into helium during a stable portion of the star’s life cycle.
What does NGC 7662 look like?
NGC 7662 (also known as the Blue Snowball Nebula, Snowball Nebula, and Caldwell 22) is a planetary nebula located in the constellation Andromeda . NGC 7662 is a popular planetary nebula for casual observers. A small telescope will reveal a star-like object with slight nebulosity.
What are the coordinates of the Snowball Nebula in Andromeda?
Coordinates: 23 h 25 m 54 s, +42° 32′ 6″. NGC 7662, also known as the Blue Snowball Nebula or Snowball Nebula, is a planetary nebula located in the constellation Andromeda.
What is the Snowball Nebula?
It’s also known as the Blue Snowball Nebula or Snowball Nebula and at apparent magnitude +8.6 is one of the brightest examples of its type and therefore a popular target for both amateur and professional astronomers. NGC 7662 is positioned 0.5 degrees southwest of star 13 And (mag. +5.7) and was discovered by William Herschel on October 6, 1784.
What is the temperature of the central star in a Nebula?
It has a faint central star that is variable, with a magnitude range of 12 to 16. The central star is a bluish dwarf with a continuous spectrum and a computed temperature of about 75,000K. The nuclei of the planetary nebulae are among the hottest stars known. NGC 7662 is a popular planetary nebula for casual observers.
