astronomy

M94 Group

M94 Group 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 M94 Group rather than just read about it. In short: The M94 Group (Canes I Group or Canes Venatici I Group) is a loose, extended group of galaxies located about 13 million light-years away in the constellations Canes Venatici and Coma Berenices. The group is one of many groups that lies within the Virgo Supercluster (i.e. the Local Supercluster) and one of the closest groups to the Local Group.

Key takeaways

M94 Group belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect M94 Group to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of M94 Group from memory before moving on to harder problems.

Reference excerpt

The M94 Group (Canes I Group or Canes Venatici I Group) is a loose, extended group of galaxies located about 13 million light-years away in the constellations Canes Venatici and Coma Berenices. The group is one of many groups that lies within the Virgo Supercluster (i.e. the Local Supercluster) and one of the closest groups to the Local Group. Although the galaxies in this cluster appear to be from a single large cloud-like structure, many of the galaxies within the group are only weakly gravitationally bound, and some have not yet formed stable orbits around the center of this group. Instead, most of the galaxies in this group appear to be moving with the expansion of the universe.

Members The table below lists galaxies that have been consistently identified as group members in the Nearby Galaxies Catalog, the Lyons Groups of Galaxies (LGG) Catalog, and the three group lists created from the Nearby Optical Galaxy sample of Giuricin et al.

Additionally, NGC 4105 and DDO 169 are frequently but not consistently identified as members of this group in the references cited above. The brightest member in this galaxy group is questionable and partly depends on the analysis used to determine group members. The LGG Catalog identifies M106 as part of this group, which would make it the brightest galaxy within the group. However, the other catalogs cited above do not identify M106 as a group member, in which case M94 would be the brightest galaxy within the group. M64 is thought to be located in the group as an isolated member.

Canes Venatici Cloud This galaxy group is sometimes erroneously called the Canes Venatici Cloud, a larger structure of which it is a member. A galaxy cloud is a supercluster substructure. The CVn Cloud used in this manner is identified by Tully and de Vaucoleurs.

See also M96 Group Sculptor Group Canes II Group (CVn II Group)

References

External links Media related to M94 Group at Wikimedia Commons

Worked examples

Example 1 — a first encounter with M94 Group

Start with the simplest possible case. Write down what M94 Group 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 M94 Group 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 M94 Group 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 M94 Group

In research: M94 Group 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 M94 Group 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: M94 Group is common in secondary-school and first-year university syllabi. It links to neighbouring topics Canes Venatici, Coma Berenices, Galaxy clusters, so understanding it makes those chapters shorter.
In everyday life: Look for M94 Group 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 M94 Group in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what M94 Group 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 M94 Group out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is M94 Group in simple terms?

Why does M94 Group 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 M94 Group?

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 M94 Group.