চন্দ্রসভা Astrophysics Contest

You can use the internet or any books to understand concepts. But don't ask direct values from anywhere.
Don't use brute force

The contest will start on August 11, 2020 at 11:35am UTC+6:00 and will run for 30 days 23 hours 25 minutes .

Be fair, be honest.
Judges' decisions will be final.
Some problems may have a submission limit. If so, that will be mentioned above the problem statement.
If you have any queries regarding any specific problem or the contest in general, ask your questions through the clarification page.

A কক্ষপথের বক্ষে

B কক্ষপথের বক্ষে 2

C কক্ষপথের বক্ষে 3

D কক্ষপথের বক্ষে 4

E গ্র‍্যাভিটির ঘুরান্টিস

F উল্কা ছোটে দুলকি চালে

G কক্ষপথের বক্ষে (Hohmann)

H কক্ষপথের বক্ষে (Escape)

I কক্ষপথের বক্ষে (Time of Flight)

J কক্ষপথের বক্ষে (Velocity at Impact)

K Binary System 1

L Binary System 2

M Binary System 3

N Binary (How heavy)

O Spectometry of Binaries

P Photometry of Binaries (Period)

Q Photometry (Temperature Ratio)

R Photometry (Radius Ratio)

S Photometry of Binaries

T Mass-Luminosity relation

U Luminosity distance

V Angular separation

W Rayleigh's criterion

X Astrometry of Binaries

Y Absolute Magnitude

Z Luminosity Magnitude Relation

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