They dont have to, but the beauty of flying is that you can essentially move from one place to another in a straight line. This cuts travel time and saves fuel. Circumnavigating weather or clouds will be impractical since airplanes now are equipped with navigation and awareness instruments that allow it to do so safely. The name of this group of equipment is avionics. You may want to try it one day . Good luck
The sky appears blue due to Rayleigh scattering, where shorter blue wavelengths of light are scattered more than other colors by molecules in the Earth's atmosphere. This scattering effect is present regardless of whether airplanes are flying or not. Airplane contrails can contribute to haze under certain atmospheric conditions, but they are not the primary reason for the sky's blue color.
A Low Pressure System allows clouds to form. It is possible that the clouds can stick around for several days in this type of system.
nebulas
Fog When the clouds suck up the water from seas, rivers, lakes. etc, they make the clouds heavy. If the clouds do not start raining, there will be fog. Definition: Fog is thick mist that is difficult to see through.
The stratosphere is a layer of Earth's atmosphere between the troposphere and mesosphere. Examples of phenomena found in the stratosphere include the ozone layer, which helps protect Earth from harmful ultraviolet radiation, as well as the presence of high-altitude clouds called noctilucent clouds. Commercial airplanes often fly in the lower stratosphere due to its stability and lack of turbulence.
Cloud seeding.
Airplanes.
Because those trails are clouds. The airplane's wing sheds low pressure vortexes from their tips, the low pressure encourages condensation of water vapor to form the small droplets of water that make up clouds. The airplane's jet engines emit lots of water vapor in their exhaust. Often at the very cold temperatures where these airplanes fly (above 30,000 feet) the water droplets in these clouds freeze, becoming ice and making the clouds last much longer.
Airplane's contrails do not form clouds; they dissipate soon after they are formed.
The fact that jet airplanes' contrails form cirrus clouds suggests that they fly at altitudes where the temperature and humidity are conducive to contrail formation, typically above 20,000 feet. This indicates that jet airplanes generally fly at high altitudes, where the air is colder and less dense, allowing contrails to persist and spread out into cirrus clouds.
Airplanes do not release water into the atmosphere. Those cloudlike trails that you see following aircraft are called "contrails" and they are caused by the agitation of the air by the aircraft passing through it, causing water molecules suspended in the air to collide and join to create droplets.
In the air, I see clouds, birds, airplanes, and sometimes insects like bees and butterflies.
CIRRUS CLOUDS FORM IN THE SKY with all the other clouds.they also form when water vapor freezes into ice crystals. because of the high altitude these clouds live in airplanes leave a trail of condensationwhich turns into a cirrus cloud
make airplanes
To make airplanes.
Some airplanes are made in the US, but not all. there are several other countries int he World that can make airplanes too.
rain clouds