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The ESO Astronomical Glossary explains a large collection of frequently used terms in astronomy. This glossary is not intended to be complete. It includes terms ...


A space-based X-ray observatory; also known as the Advanced X-ray ... In astronomy, this term is often used to describe the rate at which light flows.


Read chapter Appendix A: Glossary: Astronomers and astrophysicists are making revolutionary advances in our ... The Advanced X-ray Astrophysics Facility.


Advanced Placement® and AP® are trademarks registered and/or owned by the College Board, which is not affiliated with, and does not endorse, this site. Rice ...


Given the important role that physics plays within astronomy, the terms ... continue to scan the sky, looking for any clue of advanced life beyond Earth.


Glossary of space and planetary related terms. ... astronomical unit (AU): The average distance from the Earth to the Sun; 1 AU is 149,597,870 kilometers ( 92,960,116 miles). ... ...


Jul 20, 2017 ... Astronomy, the study of the heavens, may be the most ancient of the sciences. ... There have been, of course, more advanced observatories (in all ... luminosity o...


Jan 3, 2019 ... ALHAMBRA, Advanced LArge, Homogeneous Area Medium Band Redshift Astronomical survey. ALPO, Association of Lunar and Planetary ...


Opposition, in astronomy, the circumstance in which two celestial bodies ... of experience gained by working on that content or via study for an advanced degree. ... A separate s...


Astronomy Terms · Angular Size and Distance The apparent size of an object in the sky, or the distance between two objects, measured as an angle. · Aperture