How Astronomers measure Distance in Space | Episode 2 | Visaipalagai

How to measure distance in Space? Stellar parallax the difference in direction of a celestial object as seen by an observer from two widely separated points. The measurement of parallax is used directly to find the distance of the body from the Earth (geocentric parallax) and from the Sun (heliocentric parallax). The two positions of the observer and the position of the object form a triangle; if the base line between the two observing points is known and the direction of the object as seen from each has been measured, the apex angle (the parallax) and the distance of the object from the observer can be found simply. Reference links: 1. http://www.astro.ex.ac.uk/people/hatchell/rinr/candles.pdf 2. https://physics.stackexchange.com/questions/400358/the-difference-between-comoving-and-proper-distances-in-defining-the-observable 3. http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1912HarCi.173....1L&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf 4. https://arxiv.org/vc/arxiv/papers/0806/0806.4085v1.pdf 5. https://lco.global/spacebook/distance/cepheid-variable-stars-supernovae-and-distance-measurement/ 6. http://astronomy.swin.edu.au/cosmos/T/Type+ Ia+Supernova 7. https://astro.unl.edu/naap/hr/hr_background2.html 8. http://burro.cwru.edu/academics/Astr222/Cosmo/DistScale/indicators.html 9. https://starchild.gsfc.nasa.gov/docs/StarChild/questions/cepheids.html 10. http://spiff.rit.edu/classes/ladder/lectures/supernovae/supernovae.html Playlists: Science For Life - https://goo.gl/chD5uB Social Media Links: 🐦 Twitter - https://goo.gl/3Rzg6A 📸 Instagram - https://goo.gl/OmI2uM ALL QUALITY SCI/TECH VIDEOS - தமிழில் by visaipalagai in Tamil VISAIPALAGAI - தமிழ் #Visaipalagai https://creativecommons.org/licenses/by/3.0/

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