Everything, galaxies, stars, nebula, gas's, rocks.
All those things which occupy the space and have the mass are matter, but we also can say that , all those things which may be observed by our five sences are matter.
Space debris can be observed with telescopes.
According to quantum physics, things can exist in a state of potentiality when not observed, but their specific state is not determined until they are observed. This is known as the principle of superposition.
To have a better look at the ocean
He observed things with his eyes :)
Measurable things can be quantified or observed, such as weight, temperature, or distance. Immeasurable things cannot be easily quantified or observed, such as emotions, personal beliefs, or creativity.
Flares and a full moon are observed in space. They begin with the letter f.
its not, it is observed differently by all observers.
Things can not be set on fire in space because there is no oxygen in space.
The space probe that observed Jupiter is named Juno. Juno was launched by NASA in 2011 and entered orbit around Jupiter in 2016. It is studying the planet's atmosphere, magnetic field, and composition.
A telescope
there is no gravity in space