astronomy

Sunrise (telescope)

Sunrise (telescope) 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 Sunrise (telescope) rather than just read about it. In short: Sunrise is a balloon-borne astronomical observatory designed to observe the Sun's photosphere and chromosphere. It carries a 1-metre solar telescope that redirects infrared, visible, and ultraviolet radiation from the Sun to a suite of scientific instruments.

Key takeaways

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

Reference excerpt

Sunrise is a balloon-borne astronomical observatory designed to observe the Sun's photosphere and chromosphere. It carries a 1-metre solar telescope that redirects infrared, visible, and ultraviolet radiation from the Sun to a suite of scientific instruments. Sunrise is managed by the Max Planck Institute for Solar System Research. Sunrise completed three successful science flights between 2009 and 2024. Sunrise I and II, flown in June 2009 and June 2013, respectively, both carried an imager and magnetograph. Sunrise III, flown in July 2024, carried updated instrumentation including two slit-based spectropolarimeters and a new magnetograph. All three flights were launched from the Esrange Space Center near Kiruna, Sweden and around the Northern-Hemisphere summer solstice when the polar day allowed for continuous observation of the Sun. The first science flight of Sunrise yielded high-quality data that reveal the structure, dynamics and evolution of solar convection, oscillations and magnetic fields at a resolution of around 100 km in the quiet Sun.

Overview The strong absorption of UV radiation by the Earth's atmosphere makes it challenging to carry out ground-based observations at these wavelengths. A balloon mission reaching altitudes of above 30 km benefits from a reduction of UV absorption by 99%, making engineering solutions for the telescope easier. The launch site was in the arctic region to make uninterrupted observation of the Sun over several days possible. The telescope has a 1 metre primary mirror that directs the 1 kW of solar radiation to the first focal point where 99% of the radiation is reflected out of the telescope, the remaining light is transferred into several instruments. The one metre diameter primary mirror is made from a glass ceramic zerodur, it is the central part of the gondola of nearly 2 tons. Solar panels of 1.5 kW output power are used to power the onboard equipment and a hard disk array of 2 x 2.4 Terabyte is used to store the data during flight.

Instruments CWS, Correlating Wavefront Sensor is a CCD camera with 1 kHz read-outs responsible generate the images necessary for image stabilization and proper alignment. SUFI, Sunrise Filter Imager observes the sun in five distinct wavelengths 214, 300, 312, 388 and 397 nm, on a 2048 x 2048 pixel CCD, through a filter wheel. IMaX, Imaging Magnetograph eXperiment observes the Zeeman splitting of the iron line (FeI) around 525 nm. The observed field of view is 50 x 50 arcseconds.

Flights Sunrise completed successful science flights in June 2009, June 2013, and July 2024. For all three flights, Sunrise was launched from the Esrange Space Center near Kiruna, Sweden. These flights took place during a 40-day window defined by the period of persistent polar day around the Northern-Hemisphere summer solstice and the presence of circumpolar stratospheric winds. The polar day allowed for continuous observation of the Sun, while stratospheric winds were necessary to transport the balloon westward to northern Canada.

Sunrise I Sunrise's first flight, Sunrise I, was launched at 06:27 UTC on 8 June 2009 and landed at 23:47 UTC on 13 June 2009 on Somerset Island, Nunavut, northern Canada after a flight duration of nearly six days.

Sunrise II Sunrise's second flight, Sunrise II, was launched at 05:37 UTC on 12 June 2013 and was terminated at 11:49 UTC on 17 June 2013, landing about one hour later on the Boothia peninsula, Nunavut, northern Canada after a flight duration of over 5 days.

Sunrise III Sunrise's third flight, Sunrise III, was launched at 04:22 UTC on 10 July 2024 and landed at 19:09 UTC on 16 July 2024 between Mackenzie River and Great Bear Lake in Canada. The third edition of sunrise is a step forward in terms of onboard instrumentation, with three new instruments, SUSI, SCIP, and TuMAG.

See also List of solar telescopes Hinode Swedish Solar Telescope

References

External links Sunrise website at MPG.de Sunrise website at GWDG.de Sunrise science blog October 2007 engineering test flight account by StratoCat Video of the launch from Esrange in 2009, part 1 and part 2.

Illustrations

Worked examples

Example 1 — a first encounter with Sunrise (telescope)

Start with the simplest possible case. Write down what Sunrise (telescope) 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 Sunrise (telescope) 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 Sunrise (telescope) 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 Sunrise (telescope)

In research: Sunrise (telescope) 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 Sunrise (telescope) 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: Sunrise (telescope) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Balloon-borne telescopes, Solar telescopes, Ultraviolet telescopes, so understanding it makes those chapters shorter.
In everyday life: Look for Sunrise (telescope) 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 Sunrise (telescope) in 20 minutes

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

Frequently asked questions

What is Sunrise (telescope) in simple terms?

Why does Sunrise (telescope) 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 Sunrise (telescope)?

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 Sunrise (telescope).