... fusion reaction takes place within the top 2-20 km of the white dwarf. They are distinguished from the more well-known nova eruptions is that micronova are limited to the base of the column of accreted gas, whereas nova eruptions originate at the bo ...

Kepler-444 A is an orange main-sequence star twice the age of the Sun, an incredible 11 billion years old. Orbiting this are two red dwarfs (center, right) and five known planets. All planets orbit so close to their parent star that life as we know i...

Animation of erupting volcanoes, lava flows and storms on the primordial Earth. The Moon is seen in the sky. At this early stage, the Moon was far closer to Earth than it is now. During the Archaean epoch of the Earth's past, between 2.5-4 billion ye...

A vision of the landscape of Mars with water in the ancient past, when its atmosphere was thicker and warmer, seen from an altitude of a few hundred metres. This shows a view over a dried river estuary. There are hints of green, indicative of primiti...

Animation of erupting volcanoes, lava flows and storms on the primordial Earth. The Moon is seen in the sky through the clouds. At this early stage, the Moon was far closer to Earth than it is now. During the Archaean Eon of the Earth's past, between...

Archaean Earth. Illustration of the Earth as it may have been in the Archaean Eon (3.8 to 2.5 billion years ago) in its early history. At this time there was considerably more volcanic activity on Earth, its crust was beginning to cool and its heat f...

Archaean Earth. Illustration of the Earth as it may have been in the Archaean Eon (3.8 to 2.5 billion years ago) in its early history. At this time there was considerably more volcanic activity on Earth, its crust was beginning to cool and its heat f...