The smallest size of a cell that can be seen with the unaided human eye is about 100 microns, which is roughly the size of a grain of sand. Anything smaller than that would generally require a microscope to be visible.
Hercules is a constellation - a group of stars, visible in April and May. It is not really a group of stars, it just looks like a group as seen from the Earth. Many will be close, others will be distant.
Neptune has always been the farthest planet, but we didn't always know that. On August 24, 2006, when the International Astronomical Union (IAU) defined what it means to be a "planet", Neptune earned it's badge as the most distant (from the sun) planet in our solar system. Prior to that, when Pluto was referred to as a planet, it last crossed inside of Neptune's orbit on February 7, 1979 leaving Neptune as the most distant planet until February 11, 1999. Pluto's orbit crosses inside of Neptune's orbit for 20 years out of every 248.
Microbiology
No. Eris is too small and too distant to be seen without a powerful telescope. That is why it was not discovered until 2005.
Neptune.
Jupiter
Yes but it can only be seen in ideal conditions and with perfect eyesight. It can be seen with binoculars and at present it is in the constellation Pisces.
MercuryVenusEarthMarsJupiterSaturnand Uranus is you have good viewing conditions and good eyesight.
In perfect conditions - without any light pollution and a dark sky, Uranus is visible with the naked eyeUranus can be seen with the naked eye, but you will need perfect conditions and no light pollution.Jupiter is the largest planet to be seen with an unaided eye.Mercury, Venus, Mars and Saturn can also be seen with the unaided eye.
Yes, its one of the planets that can be seen with the unaided eye, known to ancient people as being different from the fixed stars.
yes
Moon
No airport on earth can be seen from the surface of the moon by the unaided eye.
using your unaided eye compare the image of the letter
Yes, Saturn is often easy to see.
Microbiology is the study of living things too small to be seen by the unaided eye, such as bacteria, viruses, and fungi. It involves studying their structure, function, and behavior.