precision articles
What is the single greatest adversary to high astrometric precision for ground-based telescopes?
What becomes the primary limitation on astrometric precision when telescopes escape Earth's atmosphere?
How is the error in proper motion measurement related to the total observation span?
Which objects form the foundation of the International Celestial Reference Frame (ICRF)?
How do distance errors grow as the target star moves farther away when using parallax?
Which techniques are used to mitigate distortions caused by atmospheric turbulence ('seeing')?
What systematic error is created by a slow, steady warping of the primary mirror cell over a mission?
Since astrometry is inherently relative, what determines the accuracy of any single measurement?
What technique defines the International Celestial Reference Frame (ICRF) and introduces inherent uncertainties?
What challenge arises if a star exhibits significant proper motion during the parallax baseline observation period?
What fundamental scientific operation does astronomy rely on instead of repeatable lab experimentation?
What physical phenomenon necessitated incorporating Einstein's General Relativity for planetary orbit models?
How is trigonometric parallax used by astronomers to measure the distance to nearby stars?
Why is the relative error in predicting Jupiter's position next month potentially smaller than Proxima Centauri distance uncertainty?
How do astronomers verify the composition of distant stars without retrieving physical samples?
How is the replacement of older astronomical ideas viewed as engine of scientific progress?
What constitutes high accuracy for theories attempting to explain complex phenomena like dark matter or dark energy?
What is the approximate accuracy range modern cosmology claims for measuring the universe's actual properties?
How does astronomy utilize physical laws like gravity or electromagnetism, which are confirmed via Earth testing?