Astronomers found a snail-shaped substructure of stars in our larger Milky Way galaxy. It indicates the Milky Way is still enduring the effects of a near-collision that set millions of stars moving like ripples on a pond.
Via ESA http://sci.esa.int/gaia/60670-the-sagittarius-dwarf-galaxy-in-gaia-all-sky-view/
To better understand where magma gathers in Earth’s crust, researchers studied the Taupo Volcanic Zone of New Zealand, the planet’s most active cluster.
Penitentes – large pointed spikes of ice – are known on Earth and Pluto. Jupiter’s moon Europa might have them, too, according to new research. If they’re there, they could make a future landing on Europa tricky.
Penitentes on the Upper Rio Blanco in the Central Andes of Argentina. Similar ice spikes could exist in Europa's equatorial latitudes. Image via Arvaki/Wikipedia.
Newly-discovered Asteroid 2018 UA made an extremely close approach to Earth on Friday morning. Luckily, the space rock was too small to be dangerous.
The orbit of Apollo-type asteroid 2018 UA is seen here almost intercepting Earth as we orbit the Sun. Image via NASA/JPL