biology

Laplace-P

Laplace-P is a biology 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 Laplace-P rather than just read about it. In short: Laplace-P (Russian: Лаплас — П, formerly called Europa Lander) was a proposed orbiter and lander by the Russian Federal Space Agency designed to study the Jovian moon system and explore Ganymede with a lander. Initially proposed to launch with the European Jupiter Icy Moons Explorer (JUICE) in 2022, this was later changed to an independent launch on an Angara-A5 in 2023.

Key takeaways

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

Reference excerpt

Laplace-P (Russian: Лаплас — П, formerly called Europa Lander) was a proposed orbiter and lander by the Russian Federal Space Agency designed to study the Jovian moon system and explore Ganymede with a lander. Initially proposed to launch with the European Jupiter Icy Moons Explorer (JUICE) in 2022, this was later changed to an independent launch on an Angara-A5 in 2023. The mission was cancelled due to a lack of funding in 2017.

History The Europa Lander would have been launched in 2020s as part of the Europa Jupiter System Mission proposed in 2007 by the ESA to study the Jovian moon system as well as the planet Jupiter. The orbiter would have done several flybys of other Jovian moons before being placed in orbit around Europa. The lander would have researched the ocean underneath the ice sheet of Europa. However, to avoid the damaging effects of Jupiter's radiation belts, the destination of the lander was switched in 2011 from Europa to Ganymede. Ganymede is the largest moon in the Solar System and has an internal ocean that may contain more water than all of Earth's oceans together. The orbiter would perform 13 flybys of Ganymede, and 4 flybys of Callisto and carry up to 50 kg (110 lb) of scientific instruments, while the Europa lander would have carried up to 70 kg (150 lb) of scientific instruments. Laplace-P was cancelled in 2017 to allow more funding for the Venera-D mission.

Concept

Laplace-P would be a dual mission featuring an orbiter (code name LP1) and a lander (code name LP2) to be launched together toward Jupiter. One spacecraft would orbit the moon Ganymede, while the lander would perform a soft landing on its surface. The "P" in Laplace-P stands for "posadka" (landing). The planned trajectory is to use the VEEGA (Venus-Earth-Earth Gravity Assist) route. Both spacecraft would be carrying about 50 kg (110 lb) of scientific instruments each. The lander would be powered by an RTG, while the orbiter would be equipped either with an RTG or with solar panels. If the lander is launched together with JUICE, then the Russian orbiter would be omitted due to JUICE filling its role. The advanced Russian project Laplace-P orbiter's objectives is to map the surface for lander. The main objective of the lander is to carry out remote and in-situ investigations of Ganymede's surface. The radiation conditions on the Ganymede surface are fairly benign. On the other hand, the Ganymedean gravitational parameter (GM = 9887.8 km3/s2) makes the landing on it from the orbit more difficult than in the case of Europa.

Objectives The main objectives of the mission would have been to study Ganymede's atmosphere, icy surface, habitability, and perform an in-situ search for biosignatures.

See also Moons of Jupiter Europa Lander (NASA) Jupiter Icy Moons Explorer (JUICE)

References

Worked examples

Example 1 — a first encounter with Laplace-P

Start with the simplest possible case. Write down what Laplace-P claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Laplace-P 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 Laplace-P 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 Laplace-P

In research: Laplace-P appears in biology 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 Laplace-P 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: Laplace-P is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cancelled Russian space probes, Cancelled astrobiology space missions, Cancelled missions to Europa (moon), so understanding it makes those chapters shorter.
In everyday life: Look for Laplace-P 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 Laplace-P in 20 minutes

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

Frequently asked questions

What is Laplace-P in simple terms?

Why does Laplace-P matter?

Because it connects several biology 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 Laplace-P?

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 Laplace-P.