by APOD Robot » Mon Jun 07, 2021 4:07 am
A Bright Nova in Cassiopeia
Explanation: What's that new spot of light in Cassiopeia? A nova. Although
novas occur frequently throughout the universe, this nova, known as
Nova Cas 2021 or V1405 Cas, became so unusually bright in the skies of Earth last month that it was visible to the
unaided eye. Nova Cas 2021 first brightened in mid-March but then, unexpectedly, became even brighter in mid-May and remained
quite bright for about a week. The nova then faded back to early-May levels, but now is slightly brightening again and
remains visible through binoculars. Identified by the arrow, the nova occurred toward the
constellation of Cassiopeia, not far from the
Bubble Nebula. A nova is typically caused by a
thermonuclear explosion on the surface of a
white dwarf star that is
accreting matter from a
binary-star companion -- although details of this outburst are currently unknown. Novas don't destroy the underlying star, and are
sometimes seen to recur. The
featured image was created from 14 hours of imaging from
Detroit,
Michigan,
USA. Both professional and amateur astronomers will likely continue to monitor
Nova Cas 2021 and
hypothesize about details of its cause.
[url=https://apod.nasa.gov/apod/ap210607.html] [img]https://apod.nasa.gov/apod/calendar/S_210607.jpg[/img] [size=150]A Bright Nova in Cassiopeia[/size][/url]
[b] Explanation: [/b] What's that new spot of light in Cassiopeia? A nova. Although [url=https://imagine.gsfc.nasa.gov/science/objects/cataclysmic_variables.html]novas[/url] occur frequently throughout the universe, this nova, known as [url=https://skyandtelescope.org/astronomy-news/observing-news/bright-nova-erupts-in-cassiopeia/]Nova Cas 2021[/url] or V1405 Cas, became so unusually bright in the skies of Earth last month that it was visible to the [url=https://www.visiondirect.co.uk/the-human-eye]unaided eye[/url]. Nova Cas 2021 first brightened in mid-March but then, unexpectedly, became even brighter in mid-May and remained [url=https://app.aavso.org/webobs/results/?star=000-BNX-642&num_results=200]quite bright[/url] for about a week. The nova then faded back to early-May levels, but now is slightly brightening again and [url=https://www.aavso.org/LCGv2/]remains visible[/url] through binoculars. Identified by the arrow, the nova occurred toward the [url=https://en.wikipedia.org/wiki/Cassiopeia_(constellation)]constellation of Cassiopeia[/url], not far from the [url=https://apod.nasa.gov/apod/ap170531.html]Bubble Nebula[/url]. A nova is typically caused by a [url=https://youtu.be/aHY2a145p0Y]thermonuclear explosion[/url] on the surface of a [url=https://apod.nasa.gov/apod/ap150517.html]white dwarf star[/url] that is [url=https://apod.nasa.gov/apod/ap200831.html]accreting matter[/url] from a [url=https://astronomy.swin.edu.au/cosmos/b/binary+star]binary-star[/url] companion -- although details of this outburst are currently unknown. Novas don't destroy the underlying star, and are [url=https://apod.nasa.gov/apod/ap150111.html]sometimes seen to recur[/url]. The [url=https://www.instagram.com/p/CPnkyX8p8sX/]featured image[/url] was created from 14 hours of imaging from [url=https://youtu.be/k-dc-VQQwIA]Detroit[/url], [url=https://en.wikipedia.org/wiki/Michigan]Michigan[/url], [url=https://en.wikipedia.org/wiki/United_States]USA[/url]. Both professional and amateur astronomers will likely continue to monitor [url=https://astronomy.com/news/observing/2021/03/observe-theres-a-new-nova-visible-in-cassiopeia]Nova Cas 2021[/url] and [url=https://cdn.pixabay.com/photo/2019/09/04/08/24/cat-4451003_960_720.jpg]hypothesize[/url] about details of its cause.
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