astronomy

Hale Solar Laboratory

Hale Solar Laboratory 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 Hale Solar Laboratory rather than just read about it. In short: The Hale Solar Laboratory is a historic astronomical observatory in Pasadena, Los Angeles County, California, United States. Built in 1923, it was the laboratory of astronomer George Ellery Hale (1868-1938), a pioneering figure in the development of the discipline of astrophysics in the United States.

Key takeaways

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

Reference excerpt

The Hale Solar Laboratory is a historic astronomical observatory in Pasadena, Los Angeles County, California, United States. Built in 1923, it was the laboratory of astronomer George Ellery Hale (1868-1938), a pioneering figure in the development of the discipline of astrophysics in the United States. The building, a distinctive blend of Mission Revival and Spanish Colonial Revival styles, was designated a National Historic Landmark in 1989.

Description The Hale Solar Laboratory is located in a residential area on private property south of the campus of the California Institute of Technology, on the east side of Holladay Road between Lombardy and Orlando Roads. It is set well back from the street, down a narrow tree-lined lane. It is a roughly T-shaped concrete structure, with a tile roof. The stem of the T consists of the telescope tower and Hale's library/office and living area, while the top portion of the T historically housed electrical and ventilation equipment. The main entrance is at the base of the tower, set in an arch above which is an incised bas-relief tribute to Akhenaten, the Egyptian pharaoh who worshipped the sun god Aten.

History The observatory was designed by Reginald Davis Johnson (1882 - 1952), Gordon Kaufmann (1888–1949), and Roland Coate (1890-1958) and was completed in 1923. The site's landscape master plan and gardens were designed by Beatrix Farrand. After retiring as director at the Mount Wilson Observatory, George Ellery Hale built the Hale Solar Laboratory as his office and workshop, pursuing his interest in the sun. The observatory was where Hale refined the spectrohelioscope, making it possible to perform detailed observations of the surface of the Sun. Hale's other wide-ranging contributions to the sciences include the founding of the International Astronomical Union, the Astrophysical Journal, and instrumental contributions to the founding of the California Institute of Technology.

Landmark The Hale Solar Laboratory was declared a National Historic Landmark in 1989.

See also History of Pasadena, California List of National Historic Landmarks in California National Register of Historic Places listings in Pasadena, California

References

External links National Park Service summary: Hale Solar Laboratory Palomar Skies: "A Visit to the Hale Solar Laboratory" - (2009 article)

Illustrations

Worked examples

Example 1 — a first encounter with Hale Solar Laboratory

Start with the simplest possible case. Write down what Hale Solar Laboratory 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 Hale Solar Laboratory 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 Hale Solar Laboratory 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 Hale Solar Laboratory

In research: Hale Solar Laboratory 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 Hale Solar Laboratory 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: Hale Solar Laboratory is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical observatories in California, Buildings and structures in Pasadena, California, Buildings and structures on the National Register of Historic Places in Pasadena, California, so understanding it makes those chapters shorter.
In everyday life: Look for Hale Solar Laboratory 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 Hale Solar Laboratory in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hale Solar Laboratory 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 Hale Solar Laboratory out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hale Solar Laboratory in simple terms?

Why does Hale Solar Laboratory 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 Hale Solar Laboratory?

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 Hale Solar Laboratory.