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Aurora alert! Gigantic 500,000-mile 'hole' in the sun's atmosphere could spark impressive northern lights tonight and tomorrow (photo)
By Daisy Dobrijevic last updated
The gigantic coronal hole is blasting high-speed solar wind toward Earth, potentially igniting vibrant auroras and minor geomagnetic activity on Jan. 31. and Feb. 1.
![Perihelion is when there is the shortest distance between Earth and the sun.](https://cdn.mos.cms.futurecdn.net/auLSHJN95e23JEws83g3Za-320-80.jpg)
Perihelion: What is it and when does it occur?
By Tereza Pultarova last updated
Reference Perihelion is the point at which an orbiting body is closest to the sun. The word comes from Greek and literally means around (peri) the sun (helios).
![an image of the sun showing a bright white arc of light extending from its left side](https://cdn.mos.cms.futurecdn.net/dQm6Md6g4yC36FcoFp97ie-320-80.jpg)
Invisible 'flickering' on the sun could predict potentially dangerous solar flares hours in advance
By Harry Baker published
Images captured by NASA's Solar Dynamics Observatory have revealed that "coronal loops" give off subtle flashes of ultraviolet light before a solar flare, which could act as an early warning system for dangerous space weather.
![Image of the sun with a bar magnet graphic rotating in front of it](https://cdn.mos.cms.futurecdn.net/JrsCfwuznpj7C6GMLQ4DUN-320-80.gif)
The sun's magnetic field will flip soon. Here's what to expect.
By Daisy Dobrijevic published
As we approach solar maximum, something strange is happening to the sun's magnetic field. We explore this flip in polarity in more detail and look at the effects it could have on Earth.
![A screenshot of ESA's new animation and sonification of solar activity, based on data from the Solar Orbiter mission.](https://cdn.mos.cms.futurecdn.net/zzdmnpiFdhxPjAtKuBtubS-320-80.jpg)
Scientists turn 3 years' worth of solar flares into audible sound (video)
By Stefanie Waldek published
The European Space Agency has released an audio-visual representation of solar activity over the last three years, using data from the Solar Orbiter probe.
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NASA Solar Dynamics Observatory back online after 2024 data center flood
By Sharmila Kuthunur published
The spacecraft themselves continued to operate normally in Earth orbit during the outage and "no science data has been lost."
![a white flare of light erupts from the leftmost edge of a green fuzzy blob](https://cdn.mos.cms.futurecdn.net/tBWWp6neU46De5uYEsLx4E-320-80.gif)
Sun erupts with powerful X1.2 solar flare, causes radio blackouts (photo)
By Meredith Garofalo published
The sun fired off an X1.2-class solar flare on Friday (Jan. 3), triggering radio blackouts throughout parts of the South Atlantic ocean, Africa and South America.
![](https://cdn.mos.cms.futurecdn.net/hfyuugwkeCDtwcmh2tXSyj-320-80.jpg)
NASA's Parker Solar Probe beams home 1st detailed update after record-breaking approach to the sun
By Sharmila Kuthunur published
This New Year's Day, NASA's Parker Solar Probe added to the festive cheer by sending home its first detailed telemetry data soon after its record-breaking closest-ever approach to the sun.
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