astronomy

Kiso 5639

Kiso 5639 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 Kiso 5639 rather than just read about it. In short: Kiso 5639 (also known as LEDA 36252, KUG 1138+327 or the Skyrocket Galaxy) is an irregular dwarf galaxy in the constellation Ursa Major, approximately 85 million light-years from Earth. It has an elongated and flattened shape, with a maximum diameter that extends for approximately 2,700 light years.

Key takeaways

Kiso 5639 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kiso 5639 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kiso 5639 from memory before moving on to harder problems.

Reference excerpt

Kiso 5639 (also known as LEDA 36252, KUG 1138+327 or the Skyrocket Galaxy) is an irregular dwarf galaxy in the constellation Ursa Major, approximately 85 million light-years from Earth. It has an elongated and flattened shape, with a maximum diameter that extends for approximately 2,700 light years. The new stars are distributed in about ten groups and have a mass corresponding to about one million solar masses. This intense activity also corresponds to the presence of areas in which the matter is rarefied, which were probably formed following a combination of stellar winds and supernovae explosions. The starburst of the galaxy is believed to have occurred around one million years ago.

Etymology Kiso 5639 has been referred to as the Skyrocket Galaxy, an informal name due to it being described as resembling a "July 4th skyrocket" by NASA. It has also been informally called the Rocket Galaxy due to its "tail" structure and brightness at the head.

Morphology Kiso 5639 has an extremely irregular shape. At the head is an intense concentration of stars compared to the rest of the galaxy, such that it resembles a tadpole. This area of high intensity is determined by the presence of abundant concentrations of hydrogen gas and intense star formation activity. The galaxy has an elongated and flattened "pancake" shape, with a maximum diameter that extends for approximately 2,700 light years.

Discovery Kiso 5639 was discovered in 2004 using the Hubble Space Telescope, and was further observed in February and July of 2015 with the Wide Field Camera 3.

Star formation Faint areas of star formation are present in other parts of the galaxy, with stellar elements ranging in age from several million to a few billion years. These data were collected from observations made by the Hubble Space Telescope during 2015 and were published in The Astrophysical Journal. The starburst is believed to have begun approximately one million years ago following the galaxy's encounter with a filament of intergalactic gas. The new stars in the galaxy are distributed in about ten groups and have a mass corresponding to about one million solar masses.

Gallery

See also Lists of galaxies Galaxy formation and evolution Tadpole Galaxy

References

Further reading Elmegreen, Bruce G.; Herrera, Cinthya; Rubio, Monica; Elmegreen, Debra Meloy; Almeida, Jorge Sánchez; Muñoz-Tuñón, Casiana; Olmo-Garcia, A. (2018-05-31). "NOEMA Observations of a Molecular Cloud in the Low-metallicity Galaxy Kiso 5639". Astrophysical Journal Letters. 859 (2): L22. arXiv:1805.08253. Bibcode:2018ApJ...859L..22E. doi:10.3847/2041-8213/aac6be. Wang, Q. Daniel (2022-09-01). "The tadpole galaxy Kiso 5639: a laboratory for high-energy astrophysics of metal-poor starburst". Chandra Proposal: 6336. Bibcode:2022cxo..prop.6336W.

External links Skyrocket Galaxy at ESA Skyrocket Galaxy at NASA.gov

Illustrations

Worked examples

Example 1 — a first encounter with Kiso 5639

Start with the simplest possible case. Write down what Kiso 5639 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 Kiso 5639 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 Kiso 5639 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 Kiso 5639

In research: Kiso 5639 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 Kiso 5639 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: Kiso 5639 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Active galaxies, Astronomical objects discovered in 2004, Starburst galaxies, so understanding it makes those chapters shorter.
In everyday life: Look for Kiso 5639 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 Kiso 5639 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kiso 5639 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 Kiso 5639 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kiso 5639 in simple terms?

Why does Kiso 5639 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 Kiso 5639?

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 Kiso 5639.