What 2 planets can be seen from earth?

Answer 1

There are actually five planets that can be seen from Earth. They are Venus, Mars, Saturn, Jupiter, and Mercury. Sometimes they are visible to the human eye but sometimes binoculars are needed.

Answer 2

This question needs refining as there is no 'type' of light.

Light is an electromagnetic wave which is defined by its wavelength or frequency. As you increase the wavelength the frequency decreases and vice versa.

A high wavelength/low frequency refers to light which can be described as infrared, microwave and radio (with increasing wavelength).

A low wavelength/high frequency refers to light which can be described as ultraviolet, x-ray and gamma ray.

In between the high and low end of wavelength is visible light which forms the colours that the human eye can see, you can think of this as medium wavelength and medium frequency.

All of these 'types of light' are visible from Earth. Whether from decaying radiation, a heat source or a colourful painting.

If this light originates from outer space then most of it is absorbed or reflected by Earth's atmosphere, but not all of it. This is how ground based infra-red telescopes work.

In conclusion, all forms of light are visible form Earth as even the ozone layer isn't 100% impenetrable.

Answer 3

Mercury, Venus, Mars and Saturn can be seen with the naked eye.

Answer 4

Venus and Mars are the two planets that can be seen from Earth with the naked eye. They are often visible in the night sky and are among the brightest objects other than the moon and the stars.