Lesson plan
Lambda Piscium
Lambda Piscium, Latinized from λ Piscium, is a solitary, white-hued star in the zodiac constellation of Pisces. With an apparent visual magnitude of 4.49, it is visible to the naked eye, forming the southeast corner of the "Circlet" asterism in Pisces. Based upon a measured annual parallax shift of 30.59 mas as seen from Earth, it is located 107 light years distant from the Sun. Lambda Piscium is a member of the Ursa Major Stream, lying among the outer parts, or corona, of this moving group of stars that roughly follow a common heading through space. This well-studied star has a stellar classification A7 V, indicating it is an A-type main-sequence star that is generating energy through hydrogen fusion at its core. It has 1.8 times the mass of the Sun and double the Sun's radius. The star is radiating 13.3 times the Sun's luminosity from its photosphere at an effective temperature of 7,734 K. Lambda Piscium is spinning with a projected rotational velocity of 70 km/s.
Article summary
Lambda Piscium, Latinized from λ Piscium, is a solitary, white-hued star in the zodiac constellation of Pisces. With an apparent visual magnitude of 4.49, it is visible to the naked eye, forming the southeast corner of the "Circlet" asterism in Pisces. Based upon a measured annual parallax shift of 30.59 mas as seen from Earth, it is located 107 light years distant from the Sun. Lambda Piscium is a member of the Ursa Major Stream, lying among the outer parts, or corona, of this moving group of stars that roughly follow a common heading through space. This well-studied star has a stellar classification A7 V, indicating it is an A-type main-sequence star that is generating energy through hydrogen fusion at its core. It has 1.8 times the mass of the Sun and double the Sun's radius. The star is radiating 13.3 times the Sun's luminosity from its photosphere at an effective temperature of 7,734 K. Lambda Piscium is spinning with a projected rotational velocity of 70 km/s.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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