Lesson plan

DFM Engineering

's telescope produced by DFM. This is a 1-meter, 8, Ritchey–Chrétien design. in Arizona, with a wide field view and main mirror by Kodak and Corning DFM Engineering is an American telescope and optics manufacturer founded in 1979 by Frank Melsheimer in Longmont, Colorado, following the successful construction of a then-novel 36-inch telescope for the Monterey Institute for Research in Astronomy. DFM makes medium size Cassegrain telescopes and their associated systems including telescope optics, control systems, and mounts. A range of pre-designed telescopes are made, as are various custom installations. DFM produces its classical Cassegrain design in various apertures from 16 inches (0.4 m) to 50 inches (1.3 m) and larger. The base DFM 16-inch (40 cm) telescope system cost roughly 94 thousand USD in 2005. DFM produced a 1.6 m solar telescope for the Big Bear Solar Observatory. The United States Navy purchased a 1.3 m (51-inch) DFM telescope for the United States Naval Observatory Flagstaff Station in Arizona, USA.…

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Article summary

's telescope produced by DFM. This is a 1-meter, 8, Ritchey–Chrétien design. in Arizona, with a wide field view and main mirror by Kodak and Corning DFM Engineering is an American telescope and optics manufacturer founded in 1979 by Frank Melsheimer in Longmont, Colorado, following the successful construction of a then-novel 36-inch telescope for the Monterey Institute for Research in Astronomy. DFM makes medium size Cassegrain telescopes and their associated systems including telescope optics, control systems, and mounts. A range of pre-designed telescopes are made, as are various custom installations. DFM produces its classical Cassegrain design in various apertures from 16 inches (0.4 m) to 50 inches (1.3 m) and larger. The base DFM 16-inch (40 cm) telescope system cost roughly 94 thousand USD in 2005. DFM produced a 1.6 m solar telescope for the Big Bear Solar Observatory. The United States Navy purchased a 1.3 m (51-inch) DFM telescope for the United States Naval Observatory Flagstaff Station in Arizona, USA.…

Key claims

  1. date of foundation: 1979 — source: Wikipedia · confidence 0.95

Discussion questions

  1. Summarise the article in your own words. Which single claim would you verify first, and why?
  2. The record states that the date of foundation is "1979". What evidence would count against this claim?
  3. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
  4. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

Bibliography

  1. Wikipedia https://en.wikipedia.org/w/index.php?oldid=1293958755

Key claims and bibliography are generated from the same tracked claims and sources as the article page.