It is called the solstice. In the northern hemisphere it is the summer solstice on June 20th or 21st. In the Southern Hemisphere it is the winter solstice on December 21st or 22nd. The shortest day of the year occur on the same dates in the opposite hemispheres.
The summer solstice. More than a day, it's really just a moment.
The summer solstice, on June 21st.
It is called the summer solstice.
Summer Solstice
Sept.3
The change in the length of the day is due to the tilt of the Earth. You will have your longest day of the year when you live of the part of the Earth that is tilted towards the Sun.
Mercury has the 2nd longest "sidereal day" with a sidereal rotation period of 58.646 Earth days. The longest "sidereal day" day is Venus, with a sidereal rotation period of 243.018 Earth daysIf you use the "solar day" as your definition of "day", the order is reversed. Mercury then has the longest day and Venus has the second longest day.
A day.
Instead of a similar rotational period to Earth's 24 hours, Venus takes 243 Earth days to rotate once. That's called a "sidereal day". In other words, a "day" on Venus is longer than its "year". This is the longest day in the entire Solar System. (Don't forget the "solar day" though. That's only about 117 Earth days on Venus.)
The Earth's sidereal day.
Venus. The length of "day" is 243 Earth days. That's the rotation period which is called a "sidereal day". However, there's also a "day" called the "solar day". That's the time for the Sun to complete one apparent journey around the sky. For that definition of "day", it is Mercury that has the longest day at about 176 Earth days.
The change in the length of the day is due to the tilt of the Earth. You will have your longest day of the year when you live of the part of the Earth that is tilted towards the Sun.
This depends where you are on the earth. The closer you are to a pole of the earth, the longer the day will be.
Venus. Its day is -243.0185 Earth days long. The "minus" means it rotates in the direction opposite to the Earth and all the other planets (except Uranus). Another viewpoint: That's the time to spin once, called the "sidereal day". The "solar day" is defined in a different way and is only about 116.75 Earth days long for Venus. On that definition, it is Mercury that has the longest day (about 176 Earth days.)
The Equator.
Mercury has the 2nd longest "sidereal day" with a sidereal rotation period of 58.646 Earth days. The longest "sidereal day" day is Venus, with a sidereal rotation period of 243.018 Earth daysIf you use the "solar day" as your definition of "day", the order is reversed. Mercury then has the longest day and Venus has the second longest day.
Because you're living on Bizarro World? On Earth, the summer solstice is the longest day of the year.
Equinox
i believe it was just called that because it lasted all day.
The longest day in the year is the summer solstice. It occurs between June 20th and June 22th.
The first day of summer...for 2011 the 21st /It's merely the longest day in terms of sunshine per day. In general all days are equally long because that's how we measure our timeline. However when the "longest sunny day of the year" occur is entirely depending on where you live on earth. longest sunshine would be if you lived as near the poles center as you can.
Summer Solstice