The sun, the nearest star to us, is not as quiet as it seems, and multifarious solar activities happen every hour and moment. The occurrence of these phenomena is accompanied by the accumulation and release of energy, and ...
Astronomy
Jul 12, 2022
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Recently, a research team led by Dr.Li Yan from the Yunnan Observatories of the Chinese Academy of Sciences proposed a new means to explore the small-scale magnetic fields in the solar atmosphere through analyzing the frequencies ...
Astronomy
Aug 10, 2021
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596
A new approach to analyzing the development of magnetic tangles on the Sun has led to a breakthrough in a longstanding debate about how solar energy is injected into the solar atmosphere before being released into space, ...
Astronomy
Jul 21, 2021
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Solar physicists have been having a field day of late. A variety of missions have been staring at the sun more intently ever before (please don't try it at home). From the Parker Solar Probe to the Solar Orbiter, we are constantly ...
Astronomy
Mar 9, 2021
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10
Cooperative operations between a solar observation satellite and a sounding-rocket telescope have measured the magnetic field strength in the photosphere and chromosphere above an active solar plage region. This is the first ...
Astronomy
Feb 19, 2021
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This image shows a snippet of the Sun up close, revealing a golden surface marked by a number of dark, blotchy sunspots, curving filaments, and lighter patches known as 'plages' – brighter regions often found near sunspots. ...
Space Exploration
Aug 5, 2019
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24
Scientists from the RIKEN Cluster for Pioneering Research and collaborators have used simulations to show that the photons emitted by long gamma-ray bursts, among the most energetic events to take place in the universe, originate ...
Astronomy
Apr 3, 2019
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In two recently published articles, researchers from Instituto de Astrofísica e Ciências do Espaço (IA) show that the ratio of some heavy elements in a star, like Magnesium (Mg), Silicon (Si) and Iron (Fe), have a crucial ...
Astronomy
Sep 18, 2015
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90
The universe is such a big place that it is easy to get baffled by the measurements that astronomers make. The size of UY Scuti, possibly one of the largest stars we have observed to date, is certainly baffling.
Astronomy
Feb 9, 2015
8
726
(Phys.org) —The Sun is more spirited than previously thought. Apart from the solar eruptions, huge bursts of particles and radiation from the outer atmosphere of our star, also the cooler layer right below can be the site ...
Space Exploration
Oct 20, 2014
4
0
The photosphere of an astronomical object is the region from which externally received light originates. The term itself is derived from Ancient Greek roots, φῶς, φωτός/phos, photos meaning "light" and σφαῖρα/sphaira meaning "sphere", in reference to the fact that it is a spheric surface perceived to emit light. It extends into a star's surface until the gas becomes opaque, equivalent to an optical depth of approximately 2/3. In other words, a photosphere is the deepest region of a luminous object, usually a star, that is transparent to photons of certain wavelengths.
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