Hi and welcome to my blog!
I was asked today what does the illustration on the banner of the blog mean.
The short answer – it’s a brief history of our universe.
The “Timeline of the Universe Image” by NASA/WAMP Science Team shows pivotal events in universe’s history, from the Big Bang (the glaring light at the left) to nowadays (the spacecraft at the right). The thimble-like shape illustrates the expansion of universe for over 13 billion years. The closed side depicts the universe’s mind-boggling growth at its very beginning. The area dotted with specs of light in the middle illustrates the formation of stars, galaxies, and so on, during a period when the universe went through its “middle age”. After a long stretch of slowing expansion, the “thimble” started to open-up – the universe has reached the modern-era of accelerated expansion. Coincidentally or not, the time span of the latest epoch coincides more or less with the age of our Earth.