astronomy

Galaxy 10R

Galaxy 10R 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 Galaxy 10R rather than just read about it. In short: Galaxy 10R was an American communications satellite which was operated by PanAmSat, and later Intelsat. It was constructed by Hughes and is based on the HS-601HP satellite bus.

Key takeaways

Galaxy 10R belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Galaxy 10R to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Galaxy 10R from memory before moving on to harder problems.

Reference excerpt

Galaxy 10R was an American communications satellite which was operated by PanAmSat, and later Intelsat. It was constructed by Hughes and is based on the HS-601HP satellite bus. Launch occurred on 25 January 2000, at 01:04. The launch was contracted by Arianespace, and used an Ariane 4 42L-3 carrier rocket flying from ELA-2 at the Guiana Space Centre. Galaxy 10R was built to replace the Galaxy 10 satellite, which had been lost in a launch failure on the maiden flight of the Delta III in 1998. It was launched just fourteen months after the contract to build the satellite had been signed, due to Hughes' advance production of components to allow quick production of replacement satellites. Following its launch and on-orbit testing, it was placed in geostationary orbit at 123° West, from where it provided communications services to North America. It was expected to remain in service for fifteen years, however following a malfunction of its Xenon Ion Propulsion System in August 2004, this was reduced. It was retired to a graveyard orbit in June 2008.

References

Worked examples

Example 1 — a first encounter with Galaxy 10R

Start with the simplest possible case. Write down what Galaxy 10R 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 Galaxy 10R 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 Galaxy 10R 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 Galaxy 10R

In research: Galaxy 10R 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 Galaxy 10R 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: Galaxy 10R is common in secondary-school and first-year university syllabi. It links to neighbouring topics Communications satellite stubs, Communications satellites in geostationary orbit, Satellites using the BSS-601 bus, so understanding it makes those chapters shorter.
In everyday life: Look for Galaxy 10R 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 Galaxy 10R in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Galaxy 10R 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 Galaxy 10R out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Galaxy 10R in simple terms?

Galaxy 10R was an American communications satellite which was operated by PanAmSat, and later Intelsat. It was constructed by Hughes and is based on the HS-601HP satellite bus.

Why does Galaxy 10R 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 Galaxy 10R?

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 Galaxy 10R.