Home › Links › APOD: 2015 May 4 – An Unexpected Aurora over Norway APOD: 2015 May 4 – An Unexpected Aurora over Norway May 4, 2015 • Updated Jan 17, 2026 • Links • 1 min read A different astronomy and space sciencerelated image is featured each day, along with a brief explanation. Source: APOD: 2015 May 4 – An Unexpected Aurora over Norway