astronomy

Stratoscope

Stratoscope 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 Stratoscope rather than just read about it. In short: The Stratoscopes were two balloon-borne astronomical telescopes which flew from the 1950s to the 1970s and observed in the optical and infrared regions of the spectrum. Both were controlled remotely from the ground.

Key takeaways

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

Reference excerpt

The Stratoscopes were two balloon-borne astronomical telescopes which flew from the 1950s to the 1970s and observed in the optical and infrared regions of the spectrum. Both were controlled remotely from the ground. Stratoscope I possessed a 12-inch (30.48 cm) mirror and was first flown in 1957. It was conceived by Martin Schwarzschild and built by the Perkin Elmer Corporation with funding provided by the Office of Naval Research. A small secondary mirror focussed the image from the primary into a 35 mm movie camera, which captured the images on film. Schwarzschild used the telescope to study the turbulence and granulation in the Sun's photosphere. Stratoscope II, a 36-inch (91.4 cm) reflecting telescope, flew from 1963 to 1971. This larger project proved to be beyond the ability of the university-led research team funded by ONR and, later, the National Science Foundation, so was managed by NASA as a beginning of its scientific ballooning program led by Nancy Grace Roman. The gondola it was mounted on weighed 3.5 tons. It studied planetary atmospheres, the atmospheres of red giant stars, and galaxies. On early flights of Stratoscope II, photographic film was used, but this was soon replaced by television detectors.

References

External links Smithsonian National Air and Space Museum (NASM): Mirror, Telescope, Stratoscope I Smithsonian National Air and Space Museum (NASM): Perkin Stratoscope II Telescope model Detailed account of the test flight of Stratoscope from New Brighton (MN) 8/22/57 Detailed account of the third flight of Stratoscope from New Brighton (MN) 9/25/57 Detailed account of the third flight of Stratoscope from Huron (SD) 10/17/57

Illustrations

Worked examples

Example 1 — a first encounter with Stratoscope

Start with the simplest possible case. Write down what Stratoscope 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 Stratoscope 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 Stratoscope 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 Stratoscope

In research: Stratoscope 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 Stratoscope 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: Stratoscope is common in secondary-school and first-year university syllabi. It links to neighbouring topics Balloon-borne telescopes, Infrared telescopes, Telescope stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Stratoscope 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 Stratoscope in 20 minutes

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

Frequently asked questions

What is Stratoscope in simple terms?

Why does Stratoscope 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 Stratoscope?

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 Stratoscope.