astronomy articles 2022
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What can we learn from Hubble Space Telescope observations?
Oct. 21, 2021 — By combining Hubble Space Telescope observations with theoretical models, a team of astronomers has gained insights into the chemical and physical makeup of a variety of exoplanets known as hot … Where Does Gold Come From? New Insights Into Element Synthesis in the Universe
astronomy articles about stars
Why is the study of stars important in astronomy?
Consequently, the study of the birth, life, and death of stars is central to the field of astronomy. Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example of such as a dust cloud is the Orion Nebula.
astronomy articles about black holes
How are black holes predicted?
Most famously, black holes were predicted by Einstein’s theory of general relativity, which showed that when a massive star dies, it leaves behind a small, dense remnant core. If the core’s mass is more than about three times the mass of the Sun, the equations showed, the force of gravity overwhelms all other forces and produces a black hole.
astronomy articles about stars
What are stars and stars?
Stars are the most widely recognized astronomical objects, and represent the most fundamental building blocks of galaxies. The age, distribution, and composition of the stars in a galaxy trace the history, dynamics, and evolution of that galaxy.
astronomy articles about black holes
What is a black hole?
This article is part of the NASA Knows! (Grades K-4) series. A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space.
astronomy articles about stars
How do stars contribute to the evolution of a galaxy?
The age, distribution, and composition of the stars in a galaxy trace the history, dynamics, and evolution of that galaxy. Moreover, stars are responsible for the manufacture and distribution of heavy elements such as carbon, nitrogen, and oxygen, and their characteristics are intimately tied to the characteristics of the planetary systems …
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How is data collected and analyzed in astronomy?
Data collection, transmission, and analysis are of primary importance to astronomers. The develop- ment of photomultiplier tubes and charged cou- pled devices (CCDs) provides astronomers with an efficient means of collecting data in a digital form, transmitting it via radio, and analyzing it by com- puter processing.
astronomy articles about black holes
Can the Earth fall into a black hole?
Earth will not fall into a black hole because no black hole is close enough to the solar system for Earth to do that. Even if a black hole the same mass as the sun were to take the place of the sun, Earth still would not fall in. The black hole would have the same gravity as the sun.
astronomy articles 2022
How many cool giant exoplanets has Kepler discovered?
It is the only candidate from a dedicated survey that analysed 70 cool giant exoplanets discovered by Kepler. Kepler-1708 b-i has a radius of 2.6 Earth radii and orbits its planet at 12 planetary radii.
astronomy articles about stars
How does the size of a star affect its lifespan?
In general, the larger a star, the shorter its life, although all but the most massive stars live for billions of years. When a star has fused all the hydrogen in its core, nuclear reactions cease. Deprived of the energy production needed to support it, the core begins to collapse into itself and becomes much hotter.
