Astrophysics

Homework Help & Tutoring

We offer an array of different online Astrophysics tutors, all of whom are advanced in their fields and highly qualified to instruct you.
Astrophysics
Send your subject help request Submit your homework problem, or a general tutoring request.
Get quotes from qualified tutors Receive a response from one of our tutors as soon as possible, sometimes within minutes!
Collaborate with your tutor online Work together with your tutor to answer your question within minutes!
Astrophysics Tutors Available Now
15 tutors available
PhysMath18
Israel
(PhysMath18)
Doctor of Philosophy (PhD)
Offering help to undergraduate, graduate, and postgraduate students in subjects involving Math, Physics, and Computation.
5/5(3,801+ sessions)
2 minutes avg response
alexmatematiko
Aleksander
(alexmatematiko)
Doctor of Philosophy (PhD)
MATHEMATICS * PHYSICS * Especially good at problem solving - a winner of Physics and Mathematics Olympiads
5/5(1,977+ sessions)
25 minutes avg response
physprobsolutions
Freddy
(physprobsolutions)
Doctor of Philosophy (PhD)
I am physicist by passion, not only by profession. I enjoy explaining physics. My reward is watch a spark in the eyes that says: understood!
5/5(928+ sessions)
27 minutes avg response
cocobnl
Jorge
(cocobnl)
Bachelor of Science (B.S.)
Hi! BS in Physics here. 5+ years of experience teaching. For any homework help or tutoring, just click here! 😃
5/5(652+ sessions)
27 minutes avg response
PhysicsCaptain
Zeljko
(PhysicsCaptain)
Master of Science (M.S.)
Hi, with a Master in Physics, problem solving skills and tutoring experience, I am sure I can help you with Physics, Math and Python.
4.9/5(126+ sessions)
6 minutes avg response
$30-$80 hourly rate
AstronomyLife
Vitor
(AstronomyLife)
Bachelor of Science (B.S.)
I'm an Astronomy Ph.D. student that loves teaching! I can help you with Mathematics, Physics, and Machine Learning.
0/5(54+ sessions)
18 minutes avg response
See 15 More Tutors
See what our students are saying
Describe your homework help.
FAQ Frequently Asked Questions
Can you help me with my homework in less than 24 hours?
Can you help me with my exam/quiz/test?
How much will it cost?
What kind of payments do you accept?

Astrophysics

Have you ever asked yourself a question: "What is beyond my sight? What is there that I cannot see? And what if I will never see it?" The answer to this question is the Universe.  From the tiniest atom, through the size of a human body, to the gargantuan red giants in the sky - astrophysics studies all of it.  Space - the final frontier of human knowledge.  No other field of science has to use appliances as large and complex to engineer as astrophysics does.  Only rare event nuclear physics experiments can be compared to them, but amazingly, they are used for cosmological researches.

One of the observatories that is being built right now is called the SKA, or square kilometer array and is a proposed observatory that will use hundreds of thousands of radio telescopes. These will allow astronomers to monitor the sky in outstanding detail and survey the entire sky thousands of times faster than any system that mankind has ever built.

The scale of this project is almost beyond imagination. It is situated on two continents – in Australia and Africa. It has several uses:

1) In low-frequencies it will look at the red-shift of hydrogen, for early-universe processes

2) In high-frequencies it will look at pulsars and even (maybe) pre-biological molecules in space

3) It will also be very effective for extremely quick processes such as gamma-ray bursts or supernova explosions.

One of the most important factors for telescopes is sensitivity.  Sensitivity is a measure of the minimum signal that a telescope can distinguish above the random background noise.  The more sensitive a telescope, the more light it can gather from different objects.  For SKA, the sensitivity emerges from the enormous amount of radio receivers in different frequencies that combine in each range from locations in Australia and Africa, and which have a collecting area equivalent to a single radio telescope with an area of a square kilometer.  It is a single telescope the size of a small town.

Another important factor for telescopes is something called resolution.  Resolution is a measure of the minimum size that a telescope can distinguish effectively to discern the detail.  SKA achieves it by introducing huge distances between receivers.  SKA, with its outstanding sensitivity and resolution will outstrip competition in the domain of modern telescopic systems, and will eventually give us the view of the early formation of the universe.

To clarify the perspective of the scale of this project, consider the construction of this observatory, which consists of 3 phases:

1) Phase 1 - Australia will host the low-frequency telescopes with more than 900 stations, as well as a 96-dish ‘SKA1-Survey’ telescope, and South Africa will host an array of 254 dishes, providing ~20% of the total collecting area at low and mid frequencies by 2019.

2) Phase 2 - will complete the telescope arrays at both sites, and become fully operational in the mid-2020s, by which time a couple of thousand high frequency and mid frequency telescopes and aperture arrays will be brought to the millions of low frequency antennae.  Completion of the full array at low and mid frequencies should occur by 2024.

3) Phase 3 - building of the high frequency array from 2022.

(Check out the World Public Library for more facts and figures on this).  As you see, it's a pretty huge project. So, what is it going to do?  For what do we need it?  Well, let's list the main things it plans to explore:

1.  Einstein’s Theory of General Relativity

Regardless of how exact were most of the GR tests (like the precession of the orbit of Mercury), the scientific society continues to work on gravity experiments.  These experiments are already using extreme gravitational fields – fields of pulsars and black holes. The exploration of gravity is not direct - not just because these objects exert huge gravitational effects on nearby objects - but also because of the electromagnetic fields at pulsars from which we can't really detect gravity properly.  The SKA will scan for pulsars near to black holes and look at the gravitational influences of these two objects, searching for the perturbations in the fabric of space-time itself which would be caused by such interaction

2.  Dark energy

Prior to acceleration of expansion of the universe, astronomers had thought that the expansion of the universe should be slowing under the mutual gravitational attraction of galaxies.  Instead, the universe contains another component, which astronomers have termed “dark energy”.  This force appears to counteract and even surpass the mutual gravitational attraction causing acceleration in its expansion. There are two approaches that the SKA will pursue in studying cosmology (mostly dark energy and dark matter).

The first approach involves a large survey of galaxies, searching for their hydrogen emission.  A huge number of galaxies have to be studied in order to sample a large enough volume in the universe to detect relatively subtle effects.  A second approach by which the SKA can study cosmology and dark energy is to observe the gravitational effects of clusters of galaxies by looking at radio waves traveling through the Universe.

3.  Cradle of life project

The Cradle of Life project will study the formation of earth-like planets by observing accretion disks in other star systems.  The SKA will actually be sensitive enough to detect radio transmissions like a TV signal, which could be very useful in looking for signs of intelligent life.


Despite the enormous size of the SKA, it is still small compared to the universe, and even to the field of astrophysics.  

On a level appropriate for a student seeking college homework help, a great online tutorial for astrophysics is offered by MIT's OpenCourseWare and is titled modern astrophysics.

To fulfill our tutoring mission of online education, our college homework help and online tutoring centers are standing by 24/7, ready to assist college students who need homework help with all aspects of astrophysics. Our physics tutors can help with all your projects, large or small, and we challenge you to find better online astrophysics tutoring anywhere.

Read More

College Astrophysics Homework Help

Since we have tutors in all Astrophysics related topics, we can provide a range of different services. Our online Astrophysics tutors will:

  • Provide specific insight for homework assignments.
  • Review broad conceptual ideas and chapters.
  • Simplify complex topics into digestible pieces of information.
  • Answer any Astrophysics related questions.
  • Tailor instruction to fit your style of learning.

With these capabilities, our college Astrophysics tutors will give you the tools you need to gain a comprehensive knowledge of Astrophysics you can use in future courses.

24HourAnswers Online Astrophysics Tutors

Our tutors are just as dedicated to your success in class as you are, so they are available around the clock to assist you with questions, homework, exam preparation and any Astrophysics related assignments you need extra help completing.

In addition to gaining access to highly qualified tutors, you'll also strengthen your confidence level in the classroom when you work with us. This newfound confidence will allow you to apply your Astrophysics knowledge in future courses and keep your education progressing smoothly.

Because our college Astrophysics tutors are fully remote, seeking their help is easy. Rather than spend valuable time trying to find a local Astrophysics tutor you can trust, just call on our tutors whenever you need them without any conflicting schedules getting in the way.

Start Working With Our College Astrophysics Tutors
To fulfill our tutoring mission of online education, our college homework help and online tutoring centers are standing by 24/7, ready to assist college students who need homework help with all aspects of Astrophysics.