Short answers, pulled from the story.
Avicii Arena opened on the 19th of February 1989 under the name Stockholm Globe Arena. It was later renamed the Ericsson Globe in 2009 after Swedish telecommunications company Ericsson acquired the naming rights, and became the Avicii Arena in 2021.
The arena was renamed the Avicii Arena in 2021 in honour of the late Swedish DJ Avicii, who died in 2018. To mark the renaming, the Royal Stockholm Philharmonic Orchestra recorded a performance of the Avicii song "For a Better Day" with vocals by fourteen-year-old Swedish singer Ella Tiritiello.
Avicii Arena has a diameter of 110 metres, an inner height of 85 metres, and a volume of 605,000 cubic metres. It seats 16,000 spectators for shows and concerts, and 13,850 for ice hockey.
The Sweden Solar System is the world's largest scale model of the Solar System, with its representations of the planets distributed across Sweden at proportional distances. Avicii Arena represents the Sun in this model.
The Eurovision Song Contest was held at Avicii Arena twice, in 2000 and in 2016. The arena also hosted the final of the Swedish Eurovision qualifier show Melodifestivalen from the time of its opening until 2012, and again for the first three heats of the 2022 competition.
Skyview is an exterior inclined elevator system that opened in February 2010. It has two spherical gondolas, each accommodating up to 12 passengers, which travel along parallel tracks on the outside of the south side of the Globe to give visitors a view over Stockholm.