O-type main-sequence star

High school (ages 12+)
Space & Astronomy

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Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/o-type-main-sequence-star

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. How heavy is O-type main-sequence star?15 to 100+ Solar Masses
2. What is the spectral type?O
3. What is the surface temperature?30,000 K to 50,000 K
4. What makes O-type stars so hot and bright?They have surface temperatures over 30,000 K, up to 50,000 K, giving them a blue‑white glow and huge luminosity, tens of thousands to over a million times brighter than the Sun.
5. How long do O-type stars live?They live only a few million years on the main sequence, much shorter than the Sun's billions of years.

Stellar Feedback: Processes by which stars influence their surrounding interstellar environment, affecting star formation and galactic structure.
Nucleosynthesis: The process by which new atomic nuclei are created from pre-existing nucleons and nuclei.
Supernova Remnant: The structure resulting from the explosion of a star in a supernova, expanding outwards into the interstellar medium.
Stellar Winds: A stream of charged particles released from the upper atmosphere of a star, such as the Sun.