The great physicist was hugely relieved when the discovery of the expanding universe in the s let him cross out what he declared was my greatest blunder. Why did Einstein call his cosmological constant his greatest blunder? What is the assumption taken from Hubbles discovery and recent astronomical data? The Hubble Space Telescope was launched on April 24,
By Adam Becker 2 June Don't panic, but our planet is doomed. It's just going to take a while. Roughly 6 billion years from now, the Earth will probably be vaporized when the dying Sun expands into a red giant and engulfs our planet.
But the Earth is just one planet in the solar system, the Sun is just one of hundreds of billions of stars in the galaxy, and there are hundreds of billions of galaxies in the observable universe.
What's in store for all of that? How does the universe end? The science is much less settled on how that will happen.
We're not even sure if the universe will come to a firm, defined end, or just slowly tail off. Our best understanding of physics suggests there are several options for the universal apocalypse.
It also offers some hints on how we might, just maybe, survive it. Our first clue to the end of the universe comes from thermodynamics, the study of heat.
Thermodynamics is the wild-eyed street preacher of physics, bearing a cardboard placard with a simple warning: The heat death is far worse than being burnt to a crisp Despite the name, the heat death of the universe isn't a fiery inferno.
Instead, it's the death of all differences in heat. This may not sound scary, but the heat death is far worse than being burnt to a crisp. That's because nearly everything in everyday life requires some kind of temperature difference, either directly or indirectly.
For instance, your car runs because it's hotter inside its engine than outside. Your computer runs on electricity from the local power plant, which probably works by heating water and using that to power a turbine. And you run on food, which exists thanks to the enormous temperature difference between the Sun and the rest of the universe.
However, once the universe reaches heat death, everything everywhere will be the same temperature. That means nothing interesting will ever happen again. Heat death looked like the only possible way the universe could end Every star will die, nearly all matter will decay, and eventually all that will be left is a sparse soup of particles and radiation.
Even the energy of that soup will be sapped away over time by the expansion of the universe, leaving everything just a fraction of a degree above absolute zero.-The Steady State Theory is inaccurate because the model does not create any new matter, however, just shows visual expansion.
Reflection Cont. 4. Suggest a way that a scientist could create an even more accurate model of the Big Bang Theory. We are planning missions which will tell us Mass x Acceleration = Gravitational Force The extent to which expansion is speeding up Due to the contents of the universe We can learn about the contents of the universe by studying how the expansion varies with time .
According to this description, the universe has a new aspect every instant that deviates from the concept of an infinite space; its perpetual expansion defies the concept of a confined and steady state universe. How the Universe is Organized The Universe is clumpy – stars are clumped into Galaxies, Galaxies into Clusters, Clusters into Superclusters, some Superclusters into Walls.
The clumpiness is due to the gravitational attraction among objects small and large, superposed on the overall expansion of the Universe. The Doppler Effect and the expansion of the Universe PowerPoint Presentation, PPT - DocSlides- 1.
What do you know about renowned scientist Stephen Hawking? What is his field of expertise? In which university is he an honorary professor?.
Stephen William Hawking, January 8. th. , is a British theoretical physicist. Hawking was a Professor at the University of Cambridge between and. Part 1 The Expansion of The Universe After The Big Bang: How Our Understanding Has Changed • In the , astronomer Edwin Hubble discovered the first observational evidence that indicated the universe has a finite age and was not static (Villard, ).