How old is the universe estimated to be? What is the Big Bang theory?
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- What is the difference between equatorial and horizontal coordinate systems in astronomy? How can you use a star chart and a compass to navigate using constellations?
- How does spectroscopy help us understand stars? What are the different spectral classes of stars?
- Who were some influential astronomers throughout history who contributed to our knowledge of the celestial sphere? How did the invention of the telescope revolutionize the study of constellations?
- What is the story behind the constellation Cassiopeia?
- What are some of the biggest unanswered questions in astronomy related to stars and galaxies within constellations? What future space missions are planned to study stars, galaxies, and exoplanets in more detail?
- What is Alpha Centauri and which constellation is it in?
- What are ultraviolet telescopes and what do they observe related to stars and constellations?
- What are emission nebulae?
- Are all the "stars" we see in the night sky part of our own galaxy? What are globular clusters made of?
- What is the 13th zodiac constellation, Ophiuchus? Why is Ophiuchus not traditionally included in the zodiac?
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