Watch as white dwarf star Stein 2051 B passes in front of a distant star. From these eight Hubble images—which show how the distant star’s light is deflected—astronomers were able to calculate that the white dwarf's mass is roughly 68% of our sun's mass. Credit: NASA/ESA.

Stars, stars, and even more stars! Data collected by Hubble from 2004 to 2006 reveals that the green clumps within spiral galaxy M81’s arms are areas of star formation while blue sections mark regions of young, hot stars: bit.ly/465LRrS

Just casually looking back in time. No big deal. This Hubble image required a total of 173,000 seconds of exposure time (just over 48 hours). The faintest and reddest objects are galaxies that formed 600 million years after the big bang: bit.ly/4cyo46h

#NASAWebb is the largest, most sophisticated telescope ever launched into space. Dr. Macarena Garcia Marin will review Webb’s most impactful and unexpected discoveries to date, and will look to the future of this flagship observatory—TODAY at 8:00 p.m. ET. youtube.com/live/nB2ytaIEN…

The massive binary star Eta Carinae is showcased in red, white, and blue in this Hubble portrait. The blue highlights magnesium in warm gas, seen in regions astronomers didn’t previously expect: bit.ly/3WtmWvb

This image of NGC 7714, taken by Hubble, shows the effect of an interaction between galaxies. An encounter with NGC 7715, which lies to the left, off frame, started a bout of star formation, seen in the blue arcs around this galaxy’s center: bit.ly/4cyLAjj

It’s alive! In 2019, Hubble found an unexpected thin disk of material whirling around a supermassive black hole that was theorized to be malnourished. The presence of a disk offered a unique opportunity to test Albert Einstein's theories of relativity: bit.ly/4cXZqvJ

Yes, you are seeing double! A #NASAWebb infrared image is at top left and visible light image from Hubble at bottom right. The resolution is the same—but each show off the gas, dust, and stars in various detail. Explainer: webbtelescope.pub/3WCQFSx

Galaxy interaction? Nope! It’s a chance alignment from Hubble’s perspective. More than a million light-years separate the pair. The nearer spiral is a bit warped, and its stars lighten up the galaxy behind it. Details: bit.ly/3zx3qVk

What a n-ice image! Hubble spotted building-size pieces of debris shedding from icy comet 332P/Ikeya-Murakami in 2016. The fragments, seen toward the center right, leisurely drifted away from the comet at a pace similar to the walking speed of an adult: bit.ly/3WdgMz4

Did you know black holes are common in galaxies? Hubble has helped astronomers solve a number of mysteries about supermassive black holes, including their abundance and their influence on galaxies: bit.ly/3SpC1LV

In September the sky transitions to the stars of autumn. Use Pegasus to find Alpha Capricorni, Algedi, and several star clusters. Also watch for the Harvest Moon. Watch “Tonight’s Sky” to learn about this month’s constellations—including space-based views: youtu.be/k-qQSeAUfp0

On Tuesday, Dr. Ori Fox will discuss the details of the upcoming #NASARoman mission, with a focus on potential studies on the discovery of thousands of new planets and the source of a mysterious force called dark energy that permeates our universe: youtube.com/live/NtWl9a6NQ…

NASA’s New Horizons spacecraft measured the feeble glow that comes from myriad galaxies filling the universe. The finding has settled a long-standing mystery about the source of background light: bit.ly/3X5XQ5D

How dark is dark? This is not a Dr. Seuss riddle but a serious question astronomers have been probing for years. Their big opportunity came with the New Horizons spacecraft that is now far beyond the planets at more than 5.4 billion miles from Earth. It's far enough to be free of

Two observatories united to create this detailed view of the Ring Nebula. Hubble’s crisp vision defines the colorful, detailed view at the center, while the Large Binocular Telescope reveals faint, scallop-shaped material surrounding the ring: bit.ly/3zFuSjO

This Hubble image of interacting galaxies, collectively known as Arp 142, provides an example of how a galaxy’s structure can be disrupted. The gravitational interactions with the lower galaxy stretch the gas and stars of the upper galaxy into long tails: bit.ly/460JDd4

In 2018, astronomers precisely measured the distance to globular star cluster NGC 6397 with Hubble with a method known as trigonometric parallax, which uses straightforward trigonometry, the same method used by surveyors: bit.ly/4fqTJs6

The upcoming #NASARoman telescope will be able to survey the sky 1,000 times faster than Hubble. Dr. Ori Fox will discuss the details of the Roman mission, with a focus on potential studies on the discovery of new planets—TODAY at 8:00 p.m. ET. youtube.com/live/NtWl9a6NQ…

A Martian mystery: What happened to the water that once covered the Red Planet? Scientists know some of it went deep underground, but what became of the rest? Hubble and MAVEN Mission to Mars teamed up to help scientists understand the history of water on Mars: bit.ly/3X37nsZ