The Universe As We Know It J Aatish Rao

The Boomerang Nebula

KIC 8462852 (also Tabby's Star or Boyajian's Star) is an F-type main-sequence star located in the constellation Cygnus approximately 1,470 light-years from Earth. Unusual light fluctuations of the star, including up to a 22% dimming in brightness (FLUX), were discovered by citizen scientists as part of the Planet Hunters project.

The Great Attractor is an apparent gravitational anomaly in intergalactic space at the center of the local Laniakea Supercluster, in which the Milky Way is located, in the so-called Zone of Avoidance that is very difficult to observe in visible wavelengths due to the obscuring effects of our own galactic plane.

Oumuamua is the only interstellar object detected passing through the Solar System. Formally designated 1I/2017 U1, it was discovered by Robert Weryk using the Pan-STARRS telescope at Haleakala Observatory, Hawaii, on 19 October 2017, 40 days after it passed its closest point to the Sun.

Before moving forward to understand several anomalies and events in the vast universe. You must know certain definitions and terminologies. This is a very important lecture hence I recommend everyone to not skip it. Several definitions and terminologies discussed in this session are ;
Black body,black hole, Cosmic microwave background radiation,cosmic rays,supernova,Aurora Australlis & Aurora Boreallis,binary star,meteor,meteor shower,meteorite,meteoroid,nebula,Red dwarf and Red giant, Redshift, Pulsar,Dark matter,light year,neutron star.

The Oort cloud, named after the Dutch astronomer Jan Oort, sometimes called the Öpik–Oort cloud, is a theoretical cloud of predominantly icy planetesimals proposed to surround the Sun at distances ranging from 2,000 to 200,000 AU.