University of Helsinki on Twitter: "A new type of aurora borealis is probably caused by areas of increased oxygen atom density. It was discovered a year ago by Finns and is called '
![Northern Lights Over the Frozen Old Port in Katajanokka District with Uspenski Orthodox Cathedral in Helsinki Finland Stock Photo - Image of header, snow: 125428036 Northern Lights Over the Frozen Old Port in Katajanokka District with Uspenski Orthodox Cathedral in Helsinki Finland Stock Photo - Image of header, snow: 125428036](https://thumbs.dreamstime.com/b/northern-lights-over-frozen-old-port-katajanokka-district-uspenski-orthodox-cathedral-helsinki-finland-86153830.jpg)
Northern Lights Over the Frozen Old Port in Katajanokka District with Uspenski Orthodox Cathedral in Helsinki Finland Stock Photo - Image of header, snow: 125428036
![Some aurora borealis last night from Helsinki, Finland. Here's hoping that the clouds clear for tonight. : r/SkyPorn Some aurora borealis last night from Helsinki, Finland. Here's hoping that the clouds clear for tonight. : r/SkyPorn](https://i.redd.it/y9vmc9svfrka1.jpg)