The fireball looks like a supernova - the gigantic explosion that ends the lives of stars many times bigger than our Sun.
Supernova are well studied.
This may be it. Because the blast appeared in the southern sky, Southern Hemisphere telescopes in Australia and Chile swung into action, looking for light and radio waves from the explosion. Such alerts are frequent but almost always end in disappointment, with nothing being detected. On 26 April, Mt Stromlo Observatory near Canberra became the first to pick up light from the fireball. On 2 May the Anglo-Australian Telescope near Coonabarabran got a spectrum of the light.