0
What star would not be visible to the unaided eye of an observer on earth?
Alcohen2006
To a close approximation, none of them are visible to the unaided eye. With our bare eyes, we can see only
a few thousand of the brightest ones. That's something like 0.0000025 percent
of the stars in our own galaxy, and no individual stars in any other galaxy.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
How is a lunar and solar eclipse alike?
Both lunar and solar eclipses are the result of positioning 3 astronomical bodies (earth, sun and moon) in a straight line relative to the observer. A solar eclipse is observed when the sun, moon, and earth are positioned in a straight line with an observer on the earth. A lunar eclipse is observed when the sun, earth, and moon are in a straight line with an observer on the earth. A lunar eclipse, as observed by an observer on the earth would appear as a solar eclipse as observed by an observer on the moon.
Would an observer from Earth see all the planets rotate backwards at one point?
Not at the same time, no.
Are planets always visible?
The planets in our solar system are not always visible to an observer on Earth, for various reasons. Daylight reduces the visibility of planets significantly. Mercury and Venus, since they are inside the orbit of Earth (closer to the Sun), could only be seen in favorable conditions near sunset or sunrise and not in the middle of the night (or similar difficulties in solar transit, or other planets in opposition, close to the line of sight to the Sun). They would not be visible if occluded by a celestial body (or specifically if they are below the horizon). Neptune, being too distant, can't be resolved with the naked eye; exoplanets require sophisticated equipment to resolve.
Which planet is the source of light that makes a comet visible?
From Earth it would be the Sun, which, however not a planet, but a star
When can solor eclipse happen?
A solar eclipse occurs when the path of the moon comes between the sun and the earth. The moon casts a shadow on the earth's surface and an observer within that shadow would see a solar eclipse.
What star would not be visiable to the unaided eye of an observer on earth?
Very nearly all of them are not visible to the unaided eye. With our bare eyes, we can only see the brightest few thousand stars ... something like 0.0000025 percent of the stars in our own galaxy, and no individual stars in any other galaxy.
Why can't you see all the constellations at once?
The Earth is a sphere. An observer looking up can only see the stars on their side of the planet. As the Earth rotates, it exposes the observer to the other stars visible to their hemisphere. Simply put, the earth gets in the way. If the earth were to disappear and you were floating in space, you could freely look around at the celestial sphere and observe the constellations. The number of constellations visible would be limited only by the range of your vision, which still would be insufficient to see in every direction simultaneously.
What is the farthest object on earth a person can see unaided?
That would have to be a high mountain peak in the distance I would think.
Why the moon changes through a cycle each month?
The moon does not change (much). What an observer on Earth sees changes as the Moon orbits the Earth and the Earth/Moon system orbits the Sun much more slowly is the illuminated portion of the moon growing (covering more and more of the visible portion of the Moon) and when the Moon is full, the Sun Earth and Moon are more or less in line (if they were exactly in line it would be a lunar eclipse - which does happen a few times each year). Then as the Moon continues to rotate around the Earth, night after night, less and less of the illuminated portion is visible to the observer on Earth.
How would the moon appear to an observer on earth if the moon did not rotate?
it would still appear to rotate
How does the moon appear to an observer on earth during a full moon?
Full, large or whole. Maybe the question was meant to be...How would the Earth appear to an observer on the moon during a full moon?
How is a lunar and solar eclipse alike?
Both lunar and solar eclipses are the result of positioning 3 astronomical bodies (earth, sun and moon) in a straight line relative to the observer. A solar eclipse is observed when the sun, moon, and earth are positioned in a straight line with an observer on the earth. A lunar eclipse is observed when the sun, earth, and moon are in a straight line with an observer on the earth. A lunar eclipse, as observed by an observer on the earth would appear as a solar eclipse as observed by an observer on the moon.
Where would an observer on earth's equator find the NCP?
Exactly due north of him, and on the horizon.
How the moon would appear to an observer in space during its revolution. Would phases be observable?
Yes. Unless the observer was on the back side of the moon, or on the opposite side of the earth from the moon, he/she could see the same phases that we see here on earth.
How does the microwave relate to science?
Microwaves are part of the electromagnetic spectrum which are not visible to the unaided human eye, hence, without scientific research we would never know that microwaves exist.
What unit would be used to measure an object that is smaller than a centimeter but still visible to the unaided eye?
Millimeters can be used as a measurement for items smaller than one centimeter
Which would never be visible as crescent phase?
earth
