There may be active volcanoes on Venus. article about it published in nature.
Although Venus is similar in size and mass to Earth, it does not have moving lithospheric plates. It was believed that volcanic eruptions often occur at the contact zones of different tectonic plates and therefore did not exist on Venus for a long time.
Robert Herrick of the University of Alaska compared a radar image taken by the US Magellan probe in mid-February 1991 with an image taken in mid-October 1991. The scientist noticed significant changes on the north side of the domed shield volcano Moat. In the first square, the pit in the ground has a round shape and its area does not exceed one and a half square kilometers. In the second frame, the hole acquired an irregular shape and an area of more than two square kilometers. Changes of this magnitude on Earth are associated with volcanic activity, whether it is an eruption through an vent or the movement of magma below an vent causing the walls to collapse and the culvert to expand.
A later image shows the vent walls lowering by several tens of meters and filling the vent almost to the brim. The researchers think that a lava lake formed at the hole in the eight months between shots, although it is not known whether its contents were liquid or cooled and solidified.
However, there is another explanation for the observed picture: The collapse of the walls and the widening of the hole may have been caused by an earthquake. At the same time, collapses of vents of this size in terrestrial volcanoes have always been accompanied by nearby volcanic eruptions.
Formerly the James Webb Telescope caught star before it went supernova.