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Blue-white B-star.

The spectrum of interstellar comet 2I/Borisov obtained using ISIS spectrograph on the WHT on the 20th of September, showing how the amount of light coming from the comet depends on the wavelength of light. The light emitted by cyanogen gas molecules is clearly identified, above all the light being reflected from the dust grains also emitted by the comet.

This cloud of gas and dust is full of bubbles, which are inflated by wind and radiation from massive young stars. Yellow circles and ovals show the locations of more than 30 bubbles. Squares indicate bow shocks, red arcs of warm dust formed as winds from fast-moving stars push aside dust grains.

A screenshot of the Light Pollution Simulator: the default screen.

The most distant protocluster discovered by the Subaru Telescope. The blue shading shows the calculated extent of the protocluster, and the bluer color indicates higher density of galaxies in the protocluster. The red objects in zoom-in figures are the 12 galaxies found in it. This figure shows a square field-of-view 24 arcminutes along each side (corresponding to 198 million light-years along each side at a distance of 13.0 billion light-years). Each zoom-in figure is 16 arcseconds along each side (corresponding to 2.2 million light-years).

Hubble Tracks a Galaxy on the Move

NASA’s Solar Dynamics Observatory captured this view of a solar eruption on April 21, 2015.

This illustration shows a tidal disruption, which occurs when a passing star gets too close to a black hole and is torn apart into a stream of gas. Some of the gas eventually settles into a structure around the black hole called an accretion disk.

Artistic impression of the gas giant planet GJ 3512b orbiting its red dwarf host star.

Glowing Solar Cell