Mk 2

MK2This Hubble image reveals the first moon discovered around the dwarf planet Makemake. The tiny moon is barely visible because it is almost lost in the glare of the brighter dwarf planet. The moon, nicknamed MK 2, is roughly 160 km across and orbits about 21,000 km from Makemake. Makemake is 1,300 times brighter than its moon. It’s also much larger at 1400 km across.

The Makemake system is more than 50 times farther than the Earth is from the Sun on the outskirts of our solar system in the Kuiper Belt.

Image Credits: NASA, ESA, A. Parker and M. Buie (Southwest Research Institute), W. Grundy (Lowell Observatory), and K. Noll (NASA GSFC)

The Keyhole Nebula

Keyhole_NebulaThe Keyhole is a small dark cloud of cold molecules and dust within the Carina Nebula, containing bright filaments of hot, fluorescing gas that is silhouetted against the much brighter background nebula. The diameter of the Keyhole structure is roughly 7 light years. Its appearance has changed significantly since it was first observed, possibly due to changes in the radiation from Eta Carinae.

Image Credit: NASA

Stephan’s Quintet

Stephan's_QuintetStephan’s Quintet in the constellation Pegasus is a visual grouping of five galaxies. These galaxies are of interest because of their violent collisions. Four of the five galaxies in Stephan’s Quintet form a physical association, Hickson Compact Group 92, and are involved in a cosmic dance that most likely will end with the galaxies merging.

Image Credit: ESA / NASA