astronomy

Kitt Peak National Observatory

Kitt Peak National Observatory is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Kitt Peak National Observatory rather than just read about it. In short: The Kitt Peak National Observatory (KPNO) is a United States astronomical observatory located on Kitt Peak of the Quinlan Mountains in the Arizona-Sonoran Desert on the Tohono Oʼodham Nation, 88 kilometers (55 mi) west-southwest of Tucson, Arizona. With more than twenty optical and two radio telescopes, it is one of the largest gatherings of astronomical instruments in the Earth's northern hemisphere.

Key takeaways

Kitt Peak National Observatory belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kitt Peak National Observatory to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kitt Peak National Observatory from memory before moving on to harder problems.

Reference excerpt

The Kitt Peak National Observatory (KPNO) is a United States astronomical observatory located on Kitt Peak of the Quinlan Mountains in the Arizona-Sonoran Desert on the Tohono Oʼodham Nation, 88 kilometers (55 mi) west-southwest of Tucson, Arizona. With more than twenty optical and two radio telescopes, it is one of the largest gatherings of astronomical instruments in the Earth's northern hemisphere. Kitt Peak National Observatory was founded in 1958. It is home to what was the largest solar telescope in the world, and many large astronomical telescopes of the late 20th century in the United States. The observatory was administered by the National Optical Astronomy Observatory (NOAO) from the early 1980s until 2019, after which it was overseen by NOIRLab. In June 2022, the Contreras Fire led to the evacuation of Kitt Peak. The fire reached the summit at 2 a.m. on Friday, June 17. Four non-scientific buildings, including a dormitory, were lost in the fire. 15 months later in September 2023, the observatory reopened to the public.

General information Kitt Peak was selected by its first director, Aden B. Meinel, in 1958 as the site for a national observatory under contract with the National Science Foundation (NSF) and was administered by the Association of Universities for Research in Astronomy. The land was leased from the Tohono Oʼodham under a perpetual agreement. The second director (1960 to 1971) was Nicholas U. Mayall. In 1982, NOAO was formed to consolidate the management of three optical observatories — Kitt Peak; the National Solar Observatory facilities at Kitt Peak and Sacramento Peak, New Mexico; and the Cerro Tololo Inter-American Observatory in Chile. The observatory sites are under lease from the Tohono O'odham Nation at the amount of a quarter dollar per acre yearly, which was overwhelmingly approved by the Council in the 1950s. In 2005, the Tohono O'odham Nation brought suit against the National Science Foundation to stop further construction of gamma ray detectors in the Gardens of the Sacred Tohono O'odham Spirit I'itoi, which are just below the summit. The largest optical instruments at KPNO are the Mayall 4 meter telescope and the WIYN 3.5-meter telescope; there are also several two- and one-meter class telescopes. The McMath–Pierce solar telescope was for many decades the largest solar telescope in the world and the largest unobstructed reflector (no secondary mirror in the path of incoming light). The ARO 12m Radio Telescope is also at the location. Kitt Peak is famous for hosting the first telescope (an old 91 cm reflector) used to search for near-Earth asteroids, and calculating the probability of an impact with planet Earth. Kitt Peak hosts an array of programs for the public to take part in, including:

Daytime tours, speaking about the history of the observatory as well as touring a major research telescope. The Nightly Observing Program (NOP), which allows visitors to arrive in the late afternoon, watch the sunset, and use binoculars and telescopes to view the cosmos. Additionally, there is the Overnight Telescope Observing Program (OTOP). This program allows for a one-on-one, full night of observing using any of the visitor center's telescopes. Guests may choose to do DSLR imaging, CCD imaging, or simply take in the sights with their eye to the telescope.

Kitt Peak's Southeastern Association for Research and Astronomy (SARA) Telescope was featured in the WIPB-PBS documentary, "Seeing Stars in Indiana". The project followed SARA astronomers from Ball State University to the observatory and featured time-lapse images from various points around Kitt Peak. A major project started in the 2010s is the Dark Energy Spectroscopic Instrument (DESI) for the 4-meter Mayall telescope, for conducting spectrographic astronomical surveys of distant galaxies probing the expansion history of the universe and the mysterious physics of dark energy.

History

The Kitt Peak National Observatory of the United States was dedicated on March 16, 1960. At the dedication a 36-inch telescope and various facilities were ready. Construction was underway for the then planned 84 inch telescope. (i.e. the KPNO 2.1 meter) The 84 inch (2.1 m) had its first light in September 1964. Over the decades the mountaintop hosted many telescopes, and achieved a variety of discoveries. Some examples of astronomical research KPNO contributed to include the study of dark matter, cosmic distances, high-redshift galaxies, and the Boötes Void. In addition, the observatory has engaged in variety of public outreach and education programs. In 2018, KPNO established plans for its Windows on the Universe Center for Astronomy Outreach.

Notable discoveries

In 1976 the Mayall Telescope was used to discover methane ice on Pluto. The 90 cm Spacewatch telescope was used to discover the Kuiper belt body, 20000 Varuna in the year 2000. This was discovered by an astronomer noticing the slow moving object in a blink comparison.

Climate Due to its high elevation, the observatory experiences a subtropical highland climate (Cfb) with a much cooler and wetter climate throughout the year than most of the Sonoran Desert.

Facilities

See also List of astronomical observatories List of radio telescopes List of telescope types Richard Green (astronomer)

References

Further reading Discover Magazine article about Kitt Peak, May 2005 Kitt Peak docent training book, 2008 Archived June 8, 2011, at the Wayback Machine

External links

Kitt Peak National Observatory Visitor Center – visiting and tour information Kitt Peak Webcam Kitt Peak Clear Sky Chart Forecasts of observing conditions NOAA general forecast for KPNO NOAA detailed forecast for KPNO Observing At Kitt Peak – General Overview for Observers and Staff

Illustrations

Worked examples

Example 1 — a first encounter with Kitt Peak National Observatory

Start with the simplest possible case. Write down what Kitt Peak National Observatory claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Kitt Peak National Observatory before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Kitt Peak National Observatory ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Kitt Peak National Observatory

In research: Kitt Peak National Observatory appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Kitt Peak National Observatory in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Kitt Peak National Observatory is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1958 establishments in Arizona, Astronomical observatories in Arizona, Buildings and structures in Pima County, Arizona, so understanding it makes those chapters shorter.
In everyday life: Look for Kitt Peak National Observatory outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Kitt Peak National Observatory in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kitt Peak National Observatory means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Kitt Peak National Observatory out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kitt Peak National Observatory in simple terms?

Why does Kitt Peak National Observatory matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Kitt Peak National Observatory?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Kitt Peak National Observatory.