... ic, while the other hemisphere remains solid - creating a circular 'iris' of lava surrounded by solid rock. This is called a hot eyeball planet. ...

... ic, while the other hemisphere remains solid - creating a circular 'iris' of lava surrounded by solid rock. This is called a hot eyeball planet. ...

Artwork conceptualising the expanding and accelerating Universe. Since the 1990s, astronomers have known that the Universe is not only expanding, but that the rate of expansion itself is accelerating. This is postulated to occur due to a mysterious d...

Animation of a flight into a dense cloud of dust within a bright emission nebula. Emission nebulae glow pink due to ionisation of the hydrogen gas they contain by the radiation from hot young stars recently born within them. The densest regions of ga...

Artwork of dust devils on the surface of Mars. Dust devils are tall and short-lived whirlwinds. They form when a pocket of hot air near the surface rises quickly through cooler air above it to create an updraft of rotating air. Dust devils were first...

... - differentiated nucleus or spiral arms. Spiral galaxies, like our own Milky Way, tend to have a nucleus of older stars, and hot gas, dust and young stars making up the spiral arms. Irregular galaxies tend to be small, and are commonly found as compa ...

Artwork of dust devils on the surface of Mars. Dust devils are tall and short-lived whirlwinds. They form when a pocket of hot air near the surface rises quickly through cooler air above it to create an updraft of rotating air. Dust devils were first...

Artwork of dust devils on the surface of Mars. Dust devils are tall and short-lived whirlwinds. They form when a pocket of hot air near the surface rises quickly through cooler air above it to create an updraft of rotating air. Dust devils were first...