The new video by NASA scientist Jessie Christiansen will make it easier for you to imagine how short the time humans lived on Earth.
By tracking the movements of the Solar System in the Milky Way, scientist Jessie Christiansen working at NASA tells us how long the 'dinosaur kingdom' has dominated the Earth, and when compared to the age of human beings, we see just how short the time when we are 'in power'
The Moon orbits the Earth, we orbit the Sun, and that great fireball (as well as the entire Solar System) orbits the center of the galaxy; The Sun completed a circuit in about 250 million years. Christiansen's short video shows that when our Solar System was in this position in the past, the Triassic (starting at 251.9 million years ago, lasting for 50.6 million years) is reaching its zenith, and The predecessor of the dinosaur has just appeared.
Researcher Christiansen came up with this idea when she was attending a stargazing party at the California Academy of Sciences. Those attending the event were extremely surprised to learn that when the Solar System was located on the other side of the Milky Way, dinosaurs were walking on the ground. The surprised eyes, expressed interest in the truth of history led Ms. Christiansen to start making videos.
' That's when I realized the timeline - archeology, fossil age and astronomy timeline - all fit together, ' Christiansen told Business Insider. ' Then I thought of drawing a diagram showing dinosaur evolution based on galactic motion .'
Timeline of Earth's position in the Milky Way and the time when dinosaurs appeared.
Ms. Christiansen said that she used Powerpoint and 4 hours to make the video above. Besides, she also had to correct a few things: Pleisiosaur is not a dinosaur, and the Solar System flies around the Milky Way every 250 million years, not 200 million years as in the video above.
The video above also simplifies a lot of the details about the galaxy's movements in the galaxy and the galaxy itself. Many stars, star systems also move, at different speeds than us and with our own orbits. These objects are located near the center of the galaxy flying at a faster rate. Not to mention that our galaxy is also moving in the vast Universe, getting closer and closer to the 'neighbor' of Andromeda.
'My video makes you think we went back to the site 250 million years ago, but in fact, the whole galaxy has moved a long way, ' 'says Christiansen. 'It's more like we move into a spiral through the Universe .'
I don't know when the Solar System will complete another revolution around the center of the Milky Way, what will happen to the Earth?