365 days

As viewed from the north pole star Polaris, Earth turns counterclockwise. Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes, and 4 seconds with respect to other, distant, stars (see below).

“Revolution” refers the object’s orbital motion around another object. For example, Earth rotates on its own axis, producing the 24-hour day. Earth revolves about the Sun, producing the 365-day year. A satellite revolves around a planet.

The most common convention starts the civil day at midnight: this is near the time of the lower culmination of the Sun on the central meridian of the time zone. Such a day may be referred to as a calendar day. A day is commonly divided into 24 hours of 60 minutes, with each minute composed of 60 seconds.

ancient Egyptians

“How many hours” is correct. Yet focusing on that answer might screw you up when you twist your thought around. “How much time did you spend on the road?” “It was three hours.” When we talk about amounts and quantities we usually use singular determiners, verbs and pronouns, even if the noun is plural.

FAQ – Spacecraft

How Long is a Year on Other Planets?

• Mercury: 88 days.
• Venus: 225 days.
• Earth: 365 days.
• Mars: 687 days.
• Jupiter: 4,333 days.
• Saturn: 10,759 days.
• Uranus: 30,687 days.
• Neptune: 60,190 days.

Venus

Venus has too much greenhouse gas in its atmosphere, making it too hot. Mars has too little greenhouse gas in its atmosphere, making it too cold. The Earth has the right amount of greenhouse gas to maintain moderate temperatures.

Earth

All of the planets, except for Earth, were named after Greek and Roman gods and godesses. The name Earth is an English/German name which simply means the ground. It comes from the Old English words ‘eor(th)e’ and ‘ertha’.

Most likely Earth was not named after a Greco-Roman god because it was not recognized as a planet in antiquity. The word planet means wanderer and the name Earth comes from the German word Erda and the Old English derivative of Erda, Ertha. In both languages it means ground.

Tellus, also called Terra Mater, ancient Roman earth goddess. Probably of great antiquity, she was concerned with the productivity of the earth and was later identified with the mother-goddess Cybele.

The name “Earth” is derived from both English and German words, ‘eor(th)e/ertha’ and ‘erde’, respectively, which mean ground. But, the handle’s creator is unknown. One interesting fact about its name: Earth is the only planet that wasn’t named after a Greek or Roman god or goddess.

Earth, “Tellus”, in ancient Rome was the personification of the nurse Earth, sometimes honored under the name of Terra Mater (Mother Earth), mostly identified with the Greek goddess Gaia (Gea).