Many man made objects are visible from space. Large airports and large dams are common. The Great Wall of China cannot even be seen from a fairly low orbit around the Earth. Despite looking carefully for it, the astronauts are unable to distinguish it from the landscape as it blends in too well with the area around it.
Sedna is the most distant solar system object discovered so far. It is about three times farther away than Pluto currently is. Because it is so far away, scientists are not sure if it has enough mass to be classified as a dwarf planet.
a mirage
You have two eyes, away from each by about 6 cm. The object placed nearby makes a larger angle to both eyes as compared to distant object. From that angle, you make out the distance of the object from you. Stars are too far away for human eyes (or any animal eyes, for that purpose.) to make smaller or bigger angle. They all make the smallest possible angle witch can be recognized by naked eyes and so you can not differentiate between near or distant star. All of them are distant objects for human eyes.
It was the first artificial (manmade) object to be placed in orbit around the earth. It started the space race between the USA and the USSR.
To be classified as a dwarf planet, an object must orbit the sun, be nearly spherical in shape, and have not cleared its orbit of debris. Additionally, it must not be a moon of another object. Currently, there are five recognized dwarf planets in our solar system.
Titanic
[object Object]
[object Object]
When focusing on a distant object, the lens is more convex. The convex lens bends light inward and converges it at a focal point to form a sharp image of a distant object.
One example of an object that does not share orbital space with another object is an exoplanet that has just been discovered in a distant solar system. Since it is the only known object in its orbit, it does not share its orbital space with any other celestial body.
Sedna is the most distant solar system object discovered so far. It is about three times farther away than Pluto currently is. Because it is so far away, scientists are not sure if it has enough mass to be classified as a dwarf planet.
When the ciliary muscles view a distant object, they relax. This causes the suspensory ligaments to pull tight, which flattens the lens of the eye. As a result, the eye is able to focus on the distant object by decreasing its refractive power.
it is the most distant object object known
It is known as a mirage.
uranus
When you see a distant object, your focal distance increases. This means that your eyes adjust in order to focus on the object that is far away, by lengthening the shape of the lens to bring the object into focus.
Moon