What Is A Space Nebula?

What are the 5 types of nebulae?

There are five types of cloudy or nebulous objects in the sky: planetary nebulae, emission nebulae, reflection nebulae, dark nebulae and supernova remnants..

How many nebula are there?

Right now, we know of about 3,000 planetary nebulae in our galaxy, the Milky Way, out of roughly 200 billion stars. Most of them are near the center of our galaxy. They come in many shapes, but most are spherical, elliptical, or bipolar.

Can life exist in a nebula?

Possibly, but probably not. It is not known when life formed on Earth, but Earth was once part of a nebula, and it now has life. … Solar nebulae like the one that formed our solar system are essentially cleared by the gravity of the sun and planets within 10–100 million years.

What are the two types of Nebula?

Astronomers generally classify nebulae into two broad categories — bright and dark. Bright nebulae are close enough to nearby stars that they glow, although the method in which they produce that glow depends on two factors. The first is a nebula’s proximity to the star, and the second is the star’s temperature.

What causes a dark nebula?

The extinction of the light is caused by interstellar dust grains located in the coldest, densest parts of larger molecular clouds. … Dark clouds appear so because of sub-micrometre-sized dust particles, coated with frozen carbon monoxide and nitrogen, which effectively block the passage of light at visible wavelengths.

What would happen if you went into a nebula?

Traveling through one would be almost indistinguishable from traveling anywhere else in space. You may not even notice it with unaided eyes. On a dark night, you can see the Orion Nebula as a very faint patch of gray light. Amazingly, getting closer to the nebula would not increase its brightness per square arc second.

Is a nebula bigger than a galaxy?

Nebula is a cloud of interstellar dust, while galaxy is a huge collection of stars. Size of a galaxy is much larger than size of a nebula. … Life of several stars is connected to life of a galaxy while life of only one star is associated with a nebula. Galaxies can be found in clusters in space.

How is a nebula formed?

A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a supernova. Other nebulae are regions where new stars are beginning to form. … For this reason, some nebulae are called “star nurseries.”

What is the purpose of a nebula?

Planetary nebulae are important objects in astronomy because they play a crucial role in the chemical evolution of the galaxy, returning material to the interstellar medium which has been enriched in heavy elements and other products of nucleosynthesis (such as carbon, nitrogen, oxygen and calcium).

Are nebulae dangerous?

There’s nothing especially dangerous about the nebula specifically, deep space will kill your crew in time, if their ship is damaged. They need to escape this nebula to get to somewhere they can do long-term repairs on their ship.

How many galaxies are there?

100 billion galaxiesAll in all, Hubble reveals an estimated 100 billion galaxies in the universe or so, but this number is likely to increase to about 200 billion as telescope technology in space improves, Livio told Space.com.

Is Earth in a nebula?

The planet Earth is not part of any particularly named Nebula . Earth is part of the Solar System which is part of our home galaxy, the so-called “Milky Way”, which is part of the so-called Local Group , a collection of more than 50 other galaxies in the “neighborhood” of our own galaxy.

What is it like inside a nebula?

The inside of a nebula would not look that much different from what we see when we look out at space. In the visible spectrum is may look like a faint haze or darkening of the stars. … These images are combined to highlight the nebula. Often you can see right through them in some wavelengths of light.

What does nebula look like?

If you look at something like the Orion Nebula through a telescope, it also just looks like a faint grey-white cloudiness that is only visible under decently dim lighting conditions. … With nebulae and galaxies, the colors we see in photographs are a result of the long exposure pictures and processing.

Is a nebula a dead star?

A nebula is a cloud of gas and dust in space. Some nebulae (more than one nebula) are regions where new stars are being formed, while others are the remains of dead or dying stars. Nebulae come in many different shapes and sizes.