This is an image of Uranus and Earth showing their seasons.
Click on image for full size
Image from: The Atmosphere, 5th edition

A Uranus day = a Uranus summer

As a planet orbits the sun, if its rotation axis is tilted, the portion that is tilted toward the sun will receive an excess of sunlight and energy (summer), while the hemisphere which is tilted away from the sun will receive less sunlight and energy (winter). Half a year later, the hemisphere which receives the most sun will be reversed. The fact that there may be an excess or a loss of light and energy affects planetary weather.

Because Uranus lies on its side, with the north pole facing the sun, Uranus' seasons should be very strange. The north pole faces the sun, which means it is in daylight, and the atmosphere in that hemisphere never rotates to the dark side to cool. The south pole faces away from the sun, and the atmosphere in that hemisphere never rotates into daylight to warm up. As Uranus orbits the sun, the north pole will be in daylight for half of a year (spring and summer). This means a Uranus day is the same as a Uranus summer. The weather of such a planet should be very strange.


Last modified May 7, 2009 by Randy Russell.

You might also be interested in:

Traveling Nitrogen Classroom Activity Kit

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

A Uranus summer = a Uranus day

In this picture, the Earth and Uranus are both viewed from the top. In the view of the Earth, the sun is shining from the left, and part of the north pole is in daylight and part of the north pole is in...more

Uranus Weather

The weather on earth can be described this way: air rises at the equator, where it is warm, and moves to the poles where it is colder and the air sinks. Because Uranus lies on its side, with the north...more

Uranus Clouds, Overview

The clouds of Uranus, composed of methane crystals, are found very low in the atmosphere, and are difficult to see below the smog haze s of the planet. False color is used, in the image of Uranus to the...more

Uranus' Smog

Besides methane, Uranus' atmosphere contains even more complex molecules such as ethane gas. (These gases are similar to the exhaust gases that come out of cars on earth). These molecules form layers of...more

Uranus' Mesosphere

The mesosphere of Uranus is a region of balance between warming and cooling. That essentially means that nothing happens there. Except for diffusion, the atmosphere is still. Upper reaches of the atmosphere,...more

An Overview of Uranus' Atmospheric Structure

As on Earth, the atmosphere of Uranus consists of a troposphere, stratosphere, mesosphere, and thermosphere. The troposphere is the region where the visible clouds are to be found. The stratosphere, as...more

Altitude Changes in the Belts & Zones

On Uranus, as on Jupiter, the winds in the belts and zones blow first in one direction, then in the opposite direction. Wind blows east in a belt, and west in a zone. The clouds rise up in a belt, and...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA