astronomical observation; stargazing
Refers to the scientific or hobbyist practice of observing celestial bodies. Can be used in both formal and casual contexts.
I went stargazing over the weekend.
A telescope is necessary for astronomical observation.
We did some stargazing on top of the mountain.
I'm looking forward to stargazing with my dad's telescope.
I took part in a stargazing event hosted by my school.
I went out with a friend to do some stargazing over the weekend.