Astronomy guideNatural Sciences

Astronomy study guide: one topic from orbits to stars, with worked calculations and exercises

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Astronomy study guide: one topic from orbits to stars, with worked calculations and exercises

Example result

Example for the Standard package

Study guide: solving linear equations, for students aged 13–14

The one rule

An equation is a balance. Whatever you do to one side, you do to the other, and the balance stays level. The goal is to get x alone on one side.

Worked example 3: the unknown on both sides

Solve 5x − 4 = 2x + 11.

  1. Move the x terms to one side: take 2x from both sides. 5x − 2x − 4 = 11, so 3x − 4 = 11.
  2. Move the numbers to the other side: add 4 to both sides. 3x = 15.
  3. Divide both sides by 3. x = 5.
  4. Check: 5 × 5 − 4 = 21 and 2 × 5 + 11 = 21. Both sides match.

Common mistake

In 3(x + 2) = 18, many students write 3x + 2 = 18. The 3 multiplies everything in the brackets: 3x + 6 = 18, so x = 4.

Exercises 7–10

  1. 4x + 3 = x + 18
  2. 2(x − 5) = 14
  3. 7 − x = 3x − 9
  4. 3(2x + 1) = 4x + 15

Answers: 7. x = 5 · 8. x = 12 · 9. x = 4 · 10. x = 6

Files: PDF and Word. The guide is for learning: we do not do homework or tests to be handed in.

Client: a parent whose daughter gets lost when an equation has brackets or the unknown on both sides. Task: a guide at middle school level that starts from the basics and builds up to those two cases. Standard package: up to 8 pages, 6 worked examples, 20 exercises with answers and a summary sheet. Excerpt below.

The client and all details are made up.

About this service

Astronomy mixes ideas you can picture, like why the Moon has phases, with numbers that are hard to grasp, like light-years and magnitudes. This guide takes one topic at your level, such as the seasons, Kepler's laws, the life of a star or the scale of the universe, and explains it plainly: what we see in the sky, what is really happening and how we know. Worked examples go through the calculations step by step with the units kept in view, and common misconceptions, such as summer coming from the Earth being nearer the Sun, are cleared up. Tell us the topic, the level, the course and what is confusing. You get PDF and Word files; Premium adds a test and an answer key. The guide is for learning, not for handing in: we don't do homework or tests. Check notation against your course.

What is included

  • What you getA PDF and Word guide on one astronomy topic: a plain explanation of what we observe and why, key terms, worked calculations with units, misconceptions cleared up and exercises with answers. From Standard, also a one-page sheet of ideas, units and formulas; in Premium, a self-check test of 20 questions and a separate answer key with short explanations.
  • Sky and reasonWhat we observe and what is actually going on
  • Worked calculationsDistances, periods and brightness, with units at every step
  • Scale made graspableComparisons that make huge numbers easier to picture
  • MisconceptionsPopular wrong ideas named and corrected
  • Exercises with answersFrom quick checks to multi-step problems

How it works

  1. 1
    TopicYou name the topic, the level and what is confusing
  2. 2
    WritingWe explain the ideas, solve the examples and write the exercises
  3. 3
    DeliveryYou get the guide in PDF and Word on the order page
  4. 4
    StudyYou study with it and ask for changes within your package

What we need from you

The astronomy topic (for example, eclipses, the Hertzsprung-Russell diagram or how planets around other stars are found), the level (school, an introductory college course or an adult stargazer), the curriculum and textbook if any, how much maths the learner is comfortable with, what is confusing, the language and how the guide will be used. You may attach a syllabus or notes as Word or PDF files, up to 3. Please don't send graded assignments or exam papers to be solved.

We will ask you:

  • Which astronomy topic?
  • For what level?
  • How comfortable is the learner with maths?
  • Curriculum, language and use

Compare packages

BasicOne topic, up to 4 pages$8StandardUp to 8 pages and a formula sheet$17PremiumUp to 15 pages with a test$33
Deadline1 day2 days3 days
Revisions123
Pagesup to 4up to 8up to 15
Worked examples3610
Exercises with answers102035
Summary sheetNoYesYes
Test and answer keyNoNoYes, 20 questions
SubjectAstronomyAstronomyAstronomy
OrderOrderOrder

Payment protection

You pay when you order, but the money is released only for accepted work.

  • Fixed priceThe package price does not change after you pay.
  • The money is reservedWhen you pay, the amount is only reserved. It is released to the service once you accept the work.
  • Checked before deliveryEvery result goes through a quality check before it reaches you, and you see it on the order page before accepting it.
  • Free revisionsAsk for changes within your brief as many times as the package allows.
  • Acceptance after 3 daysIf within 3 days of delivery you neither accept the work nor ask for changes, it is accepted automatically. If you write in the order chat after delivery, the order waits; once we answer, we may start the 3 days again and will say so in the chat.
  • Redo or a full refundIf the result does not match your brief and the revisions did not fix it, or the work takes more than twice its deadline, write in the order chat: we will redo the work or refund the payment in full.
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Questions and answers

Can it be for an adult stargazer with no exam?

Yes. Say so in the brief, and we keep the maths light and focus on understanding what you see in the night sky.

How much maths is in it?

As much as your level needs. A school guide may need only ratios; a college course may need Kepler's third law or the magnitude scale, solved step by step.

Are star charts included?

No. The guide is text with tables. It explains how to read a star chart or a planetarium app, but it has no maps for your location.

Will you do my homework or test?

No. We don't do homework, tests or exams to be handed in as the learner's own work; the exercises in the guide are new ones made for practice.

Will it match my curriculum?

We follow the level and course you name, but notation and depth differ, so check the guide against your course.

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