There are four right angles in angular measurements that is used is astronomy.
The study of astronomy includes everything in the universe besides our planet's atmosphere. That includes celestial bodies like the Sun, Moon, planets, and stars that we can see with our unaided eyes.
It also includes things like far-off galaxies and small particles that we can only glimpse through telescopes or other tools.
A scientist who concentrates their research on a particular issue or area outside the purview of Earth is called an astronomer in the science of astronomy.
They perform observational (by evaluating the data) or theoretical astronomy when observing astronomical objects including stars, planets, moons, comets, and galaxies.
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