<span>The outermost planets where so far away from the sun (many times the distance of earth) that they where invisible to the naked eye. This means that by simply looking into the eye at night it was possible to see the closer planets but not the outermost ones.</span>
option a because of the e search I did rite now
Explanation:
Nootropic also known as 'cognitive enhancers' are drugs that some people use in an attempt to improve memory, increase mental alertness and concentration as well as boost energy levels and wakefulness. There are many different nootropics.
Answer:
90 - 100 I believe
Explanation:
An anaerobic exercise is when your heart rate reaches 80 to 90 percent of your maximum. Subtract your current age from 220 to calculate your maximum heart rate.