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2. Amazon Redshift - Wikipedia

   en.wikipedia.org/wiki/Amazon_Redshift

   Amazon Redshift is a data warehouse product which forms part of the larger cloud-computing platform Amazon Web Services. [1] It is built on top of technology from the massive parallel processing (MPP) data warehouse company ParAccel (later acquired by Actian ), [ 2 ] to handle large scale data sets and database migrations .

3. Redshift survey - Wikipedia

   en.wikipedia.org/wiki/Redshift_survey

   Using Hubble's law, the redshift can be used to estimate the distance of an object from Earth. By combining redshift with angular position data, a redshift survey maps the 3D distribution of matter within a field of the sky. These observations are used to measure detailed statistical properties of the large-scale structure of the universe.

4. Redshift - Wikipedia

   en.wikipedia.org/wiki/Redshift

   The first redshift survey was the CfA Redshift Survey, started in 1977 with the initial data collection completed in 1982. [87] More recently, the 2dF Galaxy Redshift Survey determined the large-scale structure of one section of the universe, measuring redshifts for over 220,000 galaxies; data collection was completed in 2002, and the final ...

5. Extract, load, transform - Wikipedia

   en.wikipedia.org/wiki/Extract,_load,_transform

   Extract, load, transform (ELT) is an alternative to extract, transform, load (ETL) used with data lake implementations. In contrast to ETL, in ELT models the data is not transformed on entry to the data lake, but stored in its original raw format. This enables faster loading times.

6. Photometric redshift - Wikipedia

   en.wikipedia.org/wiki/Photometric_redshift

   A photometric redshift is an estimate for the recession velocity of an astronomical object such as a galaxy or quasar, made without measuring its spectrum.The technique uses photometry (that is, the brightness of the object viewed through various standard filters, each of which lets through a relatively broad passband of colours, such as red light, green light, or blue light) to determine the ...

7. Tired light - Wikipedia

   en.wikipedia.org/wiki/Tired_light

   Tired light was an idea that came about due to the observation made by Edwin Hubble that distant galaxies have redshifts proportional to their distance.Redshift is a shift in the spectrum of the emitted electromagnetic radiation from an object toward lower energies and frequencies, associated with the phenomenon of the Doppler effect.