astronomy

List of extrasolar planetary collisions

List of extrasolar planetary collisions 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 List of extrasolar planetary collisions rather than just read about it. In short: This is a list of collisions between exoplanets or planetesimals observed in extrasolar systems. These collisions are more common in young systems and are an important part in the growth of especially terrestrial planets from so-called planetary embryos.

Key takeaways

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

Reference excerpt

This is a list of collisions between exoplanets or planetesimals observed in extrasolar systems. These collisions are more common in young systems and are an important part in the growth of especially terrestrial planets from so-called planetary embryos. Detections of individual collisions are nevertheless rare and are detected via transits in the optical, infrared excess, silicate emission or via infrared brightening. Collisions are thought to be common in a type of debris disk, so-called extreme debris disks (EDD). Co-moving stellar or substellar companions can trigger such collisions at an old age, creating old EDDs. Only about 24 EDDs are known. This list does not include planetary bodies being accreted by white dwarfs; these are listed at List of exoplanets and planetary debris around white dwarfs.

List of individual events This list contains systems with individual collision events that were directly observed. Alternatively events were inferred from properties of the disk. The list is sorted after the start of the event.

HD 181327 has an asymmetry in its disk that could be explained by a giant collision, but later research excluded this scenario.

List of other EDDs These objects appear as EDDs in Moór et al. EDDs are listed here, because they are often associated with individual giant collisions. List is sorted after discovery year.

List of EDD without collisions

See also List of stars that have unusual dimming periods List of largest craters in the Solar System Giant impact hypothesis Mercury is thought to have lost its mantle from a collision 354P/LINEAR small asteroid that was impacted by another asteroid

References

Illustrations

Worked examples

Example 1 — a first encounter with List of extrasolar planetary collisions

Start with the simplest possible case. Write down what List of extrasolar planetary collisions 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 List of extrasolar planetary collisions 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 List of extrasolar planetary collisions 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 List of extrasolar planetary collisions

In research: List of extrasolar planetary collisions 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 List of extrasolar planetary collisions 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: List of extrasolar planetary collisions is common in secondary-school and first-year university syllabi. It links to neighbouring topics Circumstellar disks, Extrasolar planetary collisions, Impact events, so understanding it makes those chapters shorter.
In everyday life: Look for List of extrasolar planetary collisions 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “List of extrasolar planetary collisions” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study List of extrasolar planetary collisions in 20 minutes

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

Frequently asked questions

What is List of extrasolar planetary collisions in simple terms?

Why does List of extrasolar planetary collisions 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 List of extrasolar planetary collisions?

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 List of extrasolar planetary collisions.