Answer:
I am not going to answer, just explain as you asked.
Explanation:
With this, they are asking to to fill out the acronyms, or letter abbreviations for the different things. Should be simple enough, just goo gle the acronyms and find your answers :)
Answer:
1853–1924: Passenger railways and expansion
The 14-carriage train was hauled by three steam locomotives: the Sahib, Sindh, and Sultan. ... The first passenger train in eastern India ran from Howrah (near Calcutta) to Hoogly, a distance of 24 miles (39 km), on 15 August 1854.
<u>RESEARCH ON PROXIMA CENTAURI:</u>
- Robert Innes discovered proxima centauri which is closest to the Sun in 1915 and it is believed to be 4.85 billion years old.
- Innes used a blink comparator though later he was in competition with another scientist named, Voute who provided theoretical values pertaining to the star more accurately than Innes.
- The recent findings found a planet which is located close to the Proxima Centauri making it the closest planet to our Solar System.
The <u>innermost core</u> is the immovable object in a supernova explosion.
<h3>
What is Supernova?</h3>
- The enormous and dazzling explosion of a star is known as a supernova.
- This sporadic astronomical event occurs either when a white dwarf is sent off into uncontrollable nuclear fusion or in the latter stages of the formation of a massive star.
- The initial object referred to as the progenitor either entirely vaporizes or falls into a neutron star or black hole.
- A supernova's peak optical luminosity can be comparable to that of an entire galaxy before diminishing over the course of a few weeks or months.
- The most recent supernova remains have been found, although Kepler's Supernova, which happened in 1604, was the last one in the Milky Way that could be directly observed.
To learn more about supernova with the given link
brainly.com/question/12702138
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