No, vision is not always required to observe something. Observing can involve using other senses such as hearing, touch, taste, or smell. People who are visually impaired can still observe and experience the world around them through these other senses.
Observe is a verb
the world
Hubble cannot observe objects smaller than a basketball on the moon or detect dark matter directly.
microscope
An astronomer need not have any particular need to observe any part of the sun's atmosphere.
a telescope
First you need to observe the dog
the receptionist needs to observe the following: if they need a cup of tea
to observe the solar system
a hand lens check answer
No, vision is not always required to observe something. Observing can involve using other senses such as hearing, touch, taste, or smell. People who are visually impaired can still observe and experience the world around them through these other senses.
The need to observe personal protection and hygiene procedures at all times is critical. This will prevent any form of germ infection from getting to the body.
because if you don't you could get hacked, etc.
No. If you carefully study or observe a subject it won't help you sleep better. You need to think and dream, not study or observe.
You need to provide more information in your question.
To observe a lunar eclipse, you need to be in the area where the shadow of the Earth falls on the Moon. This occurs when the Earth passes between the Sun and the Moon, casting its shadow on the lunar surface.