astronomy

Mercator Telescope

Mercator 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 Mercator Telescope rather than just read about it. In short: The Mercator Telescope is a 1.2 m telescope at the Observatorio del Roque de Los Muchachos on La Palma. It is operated by the Katholieke Universiteit Leuven (Leuven University), Belgium, in collaboration with the Observatory of the University of Geneva and named after Gerard Mercator, famous cartographer.

Key takeaways

Mercator 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 Mercator Telescope to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Mercator Telescope from memory before moving on to harder problems.

Reference excerpt

The Mercator Telescope is a 1.2 m telescope at the Observatorio del Roque de Los Muchachos on La Palma. It is operated by the Katholieke Universiteit Leuven (Leuven University), Belgium, in collaboration with the Observatory of the University of Geneva and named after Gerard Mercator, famous cartographer. The telescope was completed in the year 2000 for an exoplanet research program.

Features The telescope contains two different measuring devices. First of all, there is the MeropeII CCD camera. This camera has a size of 2k by 6k pixels Frame Transfer detector originally designed for ESA's canceled Eddington space mission. The filters used together with this camera are according to the so-called geneva photometric system. The second instrument on the Mercator Telescope is the HERMES echelle spectrograph. It covers a wavelength range between 380 and 875 nm with a spectral resolution of R~85000. The P7 photometer was active from May 2001 until July 2008. The photometer measured in the 7 band Geneva photometric system. It measured the star in one channel and the sky in another so that the sky can be subtracted. The filter wheel is turning at a rate of 4 Hz, changing between the filters of the photometric system. The Swiss Euler 1.2m Telescope and the Mercator Telescope were part of the Southern Sky extrasolar Planet search Programme which has discovered numerous extrasolar planets. The Hermes spectrograph was used to monitor the Star Delta Cephei in the 2010s. The data seemed to suggest a previously unknown stellar companion. The Hermes spectrograph for Mercator was in development from at least 2004, and is a "high-resolution fiber-fed echelle spectrograph" type of design. In 2012, the MAIA instrument for astroseismology was installed. MAIA, also called the Mercator Advanced Imager for Astroseismology uses CCD to image in three passbands. Some of the technology was developed for a space telescope called the Eddington mission, which was however cancelled and thus not sent into space at that time.

See also Gran Telescopio Canarias Nordic Optical Telescope Swedish Solar Telescope List of largest optical telescopes in the 20th century

References

External links Mercator Telescope homepage The HERMES project page "Mercator Telescope". Deep Sky Videos. Brady Haran.

Illustrations

Worked examples

Example 1 — a first encounter with Mercator Telescope

Start with the simplest possible case. Write down what Mercator 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 Mercator 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 Mercator 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 Mercator Telescope

In research: Mercator 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 Mercator 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: Mercator Telescope is common in secondary-school and first-year university syllabi. It links to neighbouring topics Astronomical observatories in La Palma, Optical telescopes, so understanding it makes those chapters shorter.
In everyday life: Look for Mercator 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 Mercator Telescope in 20 minutes

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

Frequently asked questions

What is Mercator Telescope in simple terms?

Why does Mercator 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 Mercator 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 Mercator Telescope.