mercury
Mars. Its day-night cycle is only about 40 minutes longer than Earth's.
That is Uranus.
If you mean the longest: When you have the longest day, you'll also have the shortest night, and vice versa. In the northern hemisphere, the longest day is around June 21, and the shortest day is around December 21. In the southern hemisphere, it is the other way round.
effect of day and night interms of livelihood,health
It depends where you are on the planet. For most of the planet the day-night sequence is repeated every 24 hours. However at the poles the day night sequence is repeated only once every year.
Mercury. It has the longest cycle of ALL the planets, not just terrestrial.
Yes. As with just about any planet, Mars has a day and night cycle. For Mars it is about 24 hours and 40 minutes.
no,planet has a star day and night
Mars. Its day-night cycle is only about 40 minutes longer than Earth's.
That is Uranus.
The first day of summer - on/about June 21 is the longest day and shortest night.
During its rotation around its own axis half of the planet faces the sun [day] and half faces away from the sun [night] As the planet continues to turn so night slowly turns into day and then day into night and so on.
20th June is the shortest day and longest night and it falls on a Sunday, so have a sleep in!
Quote from a related question: "Alaska has the longest day of the year in the U.S. No sunset for 82 days in summer. Alaska also has the longest night with no sunrise for 67 days in winter"
If you mean the longest: When you have the longest day, you'll also have the shortest night, and vice versa. In the northern hemisphere, the longest day is around June 21, and the shortest day is around December 21. In the southern hemisphere, it is the other way round.
one rotation of its sun
daylight