Our planet is one unique place with a mix of events just to house as well as balance life. In the pact to keep life living, we know that earth rotates as well as revolves. We know that millions of years ego there was a crash on earth that knocked earth slightly off its axis making it to tilt at about 23.5 degrees. We can see that we have been able to live our lives even at the angle at which earth rotates.
With earth's tilting and rotating, the earth is able to experience different seasons which includes winter, autumn, summer, and spring at different time of the year, also we are able to experience different time frame as a result of how different parts of the globe receiving sun at varying amount at different time. This tilt although might look innocent has a lot of effect such as causing certain areas especially in the north hemisphere like Utqiagvik in Alaska experiences 24 hours sunlight for days up to 82 days during summer.
But if the earth were to tilt to a 90 degrees from the 23.5 degrees, it means that the entire north hemisphere will experience unending sunlight for the majority of the year for months. This might look like good news but in actual sense, it isn't. While plants will grow better and animals ave enough time to hunt, humans will not have the same grace because we are usually active during the day (forget those saying of a night person or a day person). As humans we will feel this effect from the inability to produce melatonin which allows us to sleep and once we are unable to sleep, we begin to suffer from depression and seasonal affective disorder.
The environment will also fee this effect if such a tilt happens because it would lead to an increase in temperature at the north pole which in turn would lead to increase in sea levels as solid ice would begin to melt. With increase temperature of sea comes more hurricanes as a result of surface evaporation but just as it will be bad for sunlight, so would it be bad during the winter because the temperature would be so cold as it would leave the sun completely and this would be followed by the death of plants and animals that cannot go into hibernation.
Now that we have talked about a tilting of earth above 23.5 degrees, what do you think will happen to our world, if our planet stops orbiting the earth. The Earth’s orbits at a velocity of 30 km/s and an escape velocity of 11 km/s. so if earth stops orbiting abruptly, we might all find ourselves in space and die immediately because of lack of oxygen and the force that sends you into space as a result of inertia but if the earth stops gradually, there will be a cascade of event.
The first one being the earth immediately draw towards the sun since the sun is always pulling the earth to itself as a result of its gravity, and this will lead to a massive increase in earth temperature which will lead to the death of plants, animals, and humans. When the earth is orbiting, it is trying to move away from the sun in a straight line and this is what keeps us in orbit. Model from the University of Colorado and Dr Dave Rothstein from Cornell's showed that we would experience the pull and increase in temperature within a space of 65 days.
Reference
https://earthobservatory.nasa.gov/features/Milankovitch/milankovitch_2.php
https://www.e-education.psu.edu/eme811/node/642
https://education.nationalgeographic.org/resource/axis/
https://earthobservatory.nasa.gov/blogs/eokids/wp-content/uploads
https://phys.org/news/2016-07-earth-orbiting-sun.html#google_vignette
https://www.labroots.com/trending/space/16386/if-earth-stopped-orbiting-the-sun
https://www.universetoday.com/129801/earth-stopped-orbiting-sun/
https://www.e-education.psu.edu/eme811/node/642
https://education.nationalgeographic.org/resource/axis/
https://earthobservatory.nasa.gov/blogs/eokids/wp-content/uploads
https://phys.org/news/2016-07-earth-orbiting-sun.html#google_vignette
https://www.labroots.com/trending/space/16386/if-earth-stopped-orbiting-the-sun
https://www.universetoday.com/129801/earth-stopped-orbiting-sun/
