- July 4 -

Earth at Aphelion

Aphelion Day is the day that the Earth and Sun are at their furthest distance from each other. Every July the Earth is at aphelion, the furthest from the Sun for the year and in January it is at perihelion, the closest to the Sun for the year.  The Earth's annual orbit around the Sun will...

Earth at Aphelion

Aphelion Day is the day that the Earth and Sun are at their furthest distance from each other. Every July the Earth is at aphelion, the furthest from the Sun for the year and in January it is at perihelion, the closest to the Sun for the year.

The Earth's annual orbit around the Sun will carry it to its furthest point from the Sun – its aphelion – at a distance of 1.02 AU.
The Earth's distance from the Sun varies over the course of the year because its orbit is slightly oval-shaped, following a path called an ellipse. On 5 July, the Earth reaches the point along this ellipse that is furthest from the Sun.
As a result, this moment marks the point in the year when the Sun appears smallest in the sky, and when the Earth receives the least radiation from it. In practice, however, the effect is incredibly small.
The Earth's orbit is almost exactly circular and its distance from the Sun varies by only about 3% over the course of the year, and so other phenomena, such the reflection of solar radiation by clouds, have a much more significant effect in determining our weather.
The annual changes in weather between the summer and winter months are caused entirely by the tilt of the Earth's axis of rotation, rather than by any change in its distance from the Sun.
Source:
http://www.souledout.org/nightsky/aphelionday/aphelionday.html
http://in-the-sky.org/news.php?id=20130705_09_100

Categories:

More holidays on this day:

Independence Day in U.S.
Sidewalk Egg Frying Day

You may also like...

Interesting events from Nature category.

Plant a Flower Day

Plant a Flower Day is a day to get a little dirt under your fingernails. Take a few minutes to plant a flower today. Gardening is a great hobby. It's enjoyed by millions of people, old and young alike. Its a hobby that virtually everyone can participate in, regardless of age, and health....

International World Water Day

International World Water Day is held annually on 22 March as a means of focusing attention on the importance of freshwater and advocating for the sustainable management of freshwater resources. An international day to celebrate freshwater was recommended at the 1992 United Nations...

International Day for the Preservation of the Ozone Layer

September 16 was designated by the United Nations General Assembly as the International Day for the Preservation of the Ozone Layer. This designation was made on December 19, 1994, in commemoration of the date, in 1987, on which nations signed the Montreal Protocol on Substances that Deplete the...

World Habitat Day

World Habitat Day is observed every year on the first Monday of October throughout the world. It was officially designated by the United Nations and first celebrated in 1986. The purpose of the day is to reflect on the state of our cities and towns and the basic human right to adequate shelter. It...

International Day for Preventing the Exploitation of the Environment in War and Armed Conflict

The United Nations’ (UN) International Day for Preventing the Exploitation of the Environment in War and Armed Conflict is annually held on November 6. It aims to educate people about the damaging effects of war and armed conflict on the environment. History On 5 November...

World Energy Conservation Day

World Energy Conservation Day is celebrated on 14th December globally to highlight the importance of energy consumption and its use in our day-to-day life, its scarcity and its impact on sustainability of global eco systems. It focuses our concentration on significant issues facing the future of...

Download KeepIn Calendar

Enjoy the interesting stories even on your phone or tablet