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Wildfire.

Composite image of W51A, the largest star-forming region in our galaxy. Dozens of massive stars that are more than eight times the size of our Sun are forming there. They create intense radiation pressure that has pushed dust out of the star’s natal cocoon, creating arcs and bubbles that glow brightly at infrared wavelengths of at 37 and 70 microns, shown in green and red in this false color image. Hot gas remains inside these features, which is shown in the 20-micron view in blue. The background star field from Spitzer is shown in white.

This flat projection mosaic of asteroid Bennu shows the locations of the first 12 surface features to receive official names from the International Astronomical Union. The accepted names were proposed by NASA’s OSIRIS-REx team members, who have been mapping the asteroid in detail over the last year. Bennu’s surface features are named after birds and bird-like creatures in mythology, and the places associated with them.

Something From Nothing

ALMA image of the old star system W43A. The high velocity bipolar jets ejected from the central aged star are seen in blue, low velocity outflow is shown in green, and dusty clouds entrained by the jets are shown in orange.

An optical image of the graphene device (shown above as a square gold pad) on a silicon dioxide/silicon chip. Shining metal wires are connected to gold electrodes for electrical measurement. The tiny graphene device has a length and width of just one-tenth of a millimeter.

LOFAR images cosmic radio monsters

M10 thrust chamber for future Vega evolution

Artist's impression of two white dwarfs in the process of merging. Depending on the combined mass, the system may explode in a thermonuclear supernova, or coalesce into a single heavy white dwarf, as with WDJ0551+4135. This image is free for use if used in direct connection with this story but image copyright and credit must be University of Warwick/Mark Garlick.

Figure 1. Extension of the concept of integral "numbers". Black points are the ordinary integers shown in a complex plane. Addition or multiplication of any pair of black points ends up with another black point. All the red points and blue points in this figure are solutions to some quadratic equations with integer coefficients. The purple points are solutions to some quartic equations with integer coefficients. So, we can think of those points also as a part of "numbers". Addition and multiplication operations among black-or-red points remain within the "numbers" shown in black-or-red points, and similarly, those operations of black-red-blue-or-purple points remain within the "numbers" in black-red-blue-or-purple points. In this way, it is possible to expand the set of integral "numbers" gradually.