Question 1

What is an arcsecond?

Accepted Answer

An arcsecond is 1/60 of an arcminute (1/3600 of a degree). Used for precise astronomical measurements.

Question 2

How small is one arcsecond?

Accepted Answer

One arcsecond is tiny—a dime viewed from 2.5 miles away subtends about one arcsecond.

Question 3

What's the difference between degrees and radians?

Accepted Answer

Degrees divide a circle into 360 parts (historical, from Babylonians). Radians use the mathematical relationship where 2π radians = 360°, making calculus simpler.

Question 4

When should I use radians vs degrees?

Accepted Answer

Use degrees for everyday angles and navigation. Use radians for mathematics, physics, and programming where trigonometric functions expect radian input.

Degrees to Arcseconds Converter

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