Update – August 29, 2024 05:41 PM IST
Published – August 29, 2024 05:39 PM IST
Science-Five | Hindu Science Quiz: On planetary nebulae
Observation of a planetary nebula from the NIRCam instrument on NASA’s James Webb Space Telescope, a revolutionary instrument designed to observe the dawn of the universe and released on July 12, 2022.
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1 / 5 | What are planetary nebulae?
- Planets that explode into nebulae
- Where do nursery planets originate?
- the gaseous remains of a star after its outer layers have been ejected
- the remains of a star that had planets in its system
A planetary nebula is a region of cosmic gas and dust formed from the outer layers of a dying star. Despite their name, planetary nebulae have nothing to do with planets.
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2 / 5 | How long do planetary nebulae last?
- Thousands of years
- three years
- Billions of years
- Seven years
Planetary nebulae last for a relatively short time – thousands of years – before they fade into space
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3 / 5 | Name the first planetary nebula discovered so far.
- Cat’s Eye Nebula
- Dumbbell Nebula
- Ring Nebula
- Horsehead Nebula
The Dumbbell Nebula, also known as Messier 27 (M27), was the first planetary nebula ever discovered. It was observed in 1764 by French astronomer Charles Messier.
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4 / 5 | Why are planetary nebulae so colourful?
- The color of the nebula depends on the color of the star
- Dust particles give color to the nebula
- The temperature of a nebula determines its color
- The presence of gases like helium, nitrogen and oxygen gives them this colour
The bright colors of planetary nebulae such as blue, green and red come from glowing gases such as hydrogen, helium, nitrogen and oxygen.
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5 / 5 | At what stage in the Sun’s life can it become a planetary nebula?
- when it becomes a red giant
- when it is a protostar
- When the Sun becomes a white dwarf and fades away
- As a white dwarf
All planetary nebulae form at the end of the life of a medium-mass star, about 1-8 solar masses. It is expected that the Sun will form planetary nebulae at the end of its life cycle – in about 5 billion years.
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