Unit - 15
A Trip to Infinity
Dr. Krishna Sunder A.
Assistant Professor
Department of English
K.A.H.M. Unity Women’s College, Manjeri
Summary
"A Trip to Infinity" is a fascinating and visually engaging documentary that discusses how the universe might end. The end of the Universe is a challenging question that fascinates many scientists. Many Astrophysicists are working to find this out. As the documentary begins, the three various possibilities of the end of the universe are suggested. But these possibilities are literally frightening.
The first possibility is named as “The Big Crunch”. According to this theory, the Universe would go back into its original size with the severe gravitational pull which works in the reverse order. This is called by the scientists as the Big Crunch which means the universe will shrink and reduce and will eventually disappear. In simple words, Gravity pulls the universe back into itself, collapsing all matter into a fireball.
The second possibility is named as “The Big Chill”. In this case, the Universe will grow cold and frozen and will turn into a place which is dark, cold and lifeless devoid of sunlight. The universe expands until stars burn out, leading to a cold, dark, and lonely existence.
The third one is when the entire universe looks like a balloon inflated with so much air that it finally bursts and pops up. This is called “The Big Rip”. The universe expands at an accelerating rate, eventually tearing apart everything, down to the atomic level. An experiment with a coffee mug is showcased by Dr. Robert. The coffee mug can hold coffee inside as all the particles and atoms of the mug stay together. But imagine a scenario where all these atoms split and stay apart where the mug collapses and the coffee spills. This is exactly what might happen to the universe here. Stars will explode here (Exploding stars are called supernovae) and everything will split apart.
Now the scientists argue that in order to know how the universe might end, we should first know how it began and then takes us back to the Big Bang Theory.
The Big Bang: The documentary revisits Edwin Hubble's 1929 discovery that the universe is expanding, leading to the Big Bang theory. This theory posits that the universe exploded into existence from a point smaller than an atom.
Investigation and experiments are done at the Wison Observatory in California. Going back to the theory of how Universe began or emerged, they start with the scientist Edwin Hubble who in the year 1929 found out that the universe is forever expanding. He found this out through the Hubble’s telescope. This was a strange discovery back then and the finding that it is expanding proved that it will stop expanding at one point. Just like anything that is thrown up should indeed fall down, a forever expanding thing will stop expanding at one point. This theory says universe would be pulled back to its launchpad. Keck telescope too has helped in knowing more about the cosmos.
Dark Matter and Dark Energy: The documentary highlights the ongoing battle between dark matter, which acts as "cosmic glue” and the repelling force of dark energy. The dominance of either force will determine the universe's fate.
The documentary also discusses black holes and the use of w-maps to asses the universe. The documentary emphasises that understanding the universe's fate requires ongoing research into dark energy and dark matter. However, this phenomena might happen only after 50 billion years and hence there is ample time to conduct a detailed research into this.
Answer in two or three sentences
- Indicate how the Big Bang theory explains the origin of the universe ?
Ans : The universe began from a point smaller than an atom.This understanding of the Big Bang stems from Edwin Hubble's 1929 discovery that the universe is expanding. The expansion of the universe implies a starting point, which is the Big Bang.
2. Demonstrate the role of Hubble’s telescope in advancing our understanding of the universe’s expansion ?
Ans : The Hubble’s telescope has allowed us to observe galaxies at great distances, providing insights into the early universe and its expansion over time. It has contributed significantly to our understanding of the universe's expansion.
3. Examine the significance of supernovae in the formation of elements in the universe.
Ans : An exploding star is called a supernovae. Supernovae scatter the elements.They provide the building blocks for planets and biological molecules.
4. Apply the concept of infinity to describe the challenges of comprehending the universe’s vastness.
Ans : The concept of infinity serves as a powerful lens through which we can appreciate the limitations of human comprehension when faced with the universe's vastness. The very idea of an infinite universe raises profound philosophical questions that further challenge the understanding capability of human minds.
5. Generate an explanation for the possible outcomes of the universe, such as the big crunch.
Ans : Gravity eventually will attack the expansion of the universe, pulling everything back together. This leads to a collapse into a single, extremely hot and dense state, essentially the reverse of the Big Bang. The documentary presents this as one possibility for the universe's end.
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6. Analyse the concept of Dark Energy and its impact on the accelerated expansion of the universe.
Ans : The documentary introduces dark energy as a mysterious force that opposes gravity. It's a force that pushes galaxies apart. Observations show that the universe's expansion isn't just continuing, it's accelerating. This acceleration is attributed to dark energy. Dark energy's influence is crucial in determining the universe's fate. The documentary presents the Big Rip and the Big Chill as the most likely scenarios, given dark energy's accelerating effect. If dark energy remains constant, the universe will continue to expand and cool down, eventually leading to a cold, dark, and lonely state. If dark energy continues to strengthen, it could lead to the Big Rip, where the fabric of space-time itself is torn apart. The documentary highlights that scientists are still working to understand the nature of dark energy and its influence on the universe's destiny.
7. Examine the differences between black holes and white holes, focussing on their theoretical implications in cosmology.
Ans : Black holes and white holes are fascinating theoretical concepts arising from Einstein's theory of general relativity.While black holes are now established astronomical objects, white holes remain purely hypothetical.A black hole is a region of spacetime where gravity is so strong that nothing, not even light, can escape once it crosses the event horizon. A white hole is a hypothetical region of spacetime that is the time reversal of a black hole.Theoretically, nothing can enter a white hole from the outside, but matter and energy can emerge from it.
8. Create a scenario that explains the future collision between the Milky Way and the Andromeda Galaxy, based on current scientific predictions.
Ans : This is a slow-motion collision of two giant spiral galaxies: our own Milky Way and its larger neighbour, the Andromeda Galaxy (also known as M31). Here's a scenario based on current scientific predictions: conclusion, the collision between the Milky Way and Andromeda is not a destructive event in the traditional sense of widespread stellar collisions. Instead, it's a slow, gravitational dance that will ultimately lead to the merging of two majestic spiral galaxies into a new, larger cosmic entity, reshaping the structure of our local universe on an immense timescale.