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Alma’s close-up view of the centre of galaxy NGC 1377 reveals a swirling jet. In this colour-coded image, reddish gas clouds are moving away from us, bluish clouds towards us, relative to the galaxy’s centre. The image shows light with wavelength around one millimetre from molecules of carbon monoxide (CO).
Image via ALMA/ESO/NRAO/S. Aalto & F. Costagliola

Swirling jet reveals black hole clues

A jet of swirling, cool, dense gas in the center of a galaxy – 70 million light-years from Earth – gives new clues to how supermassive black holes grow.

This artist's rendering shows NASA's Juno spacecraft making one of its close passes over Jupiter. Image via  NASA/JPL-Caltech

Success! Juno is orbiting Jupiter

After a 5-year voyage, Juno performed a successful braking maneuver on July 4. First spacecraft to enter Jupiter orbit since Galileo in the 1990s.

Image via NASA

Earth-sized aurora on Jupiter

NASA released this image as the Juno spacecraft arrived at Jupiter.

Scientists will use the twin magnetometers aboard NASA's Juno spacecraft to gain a better understanding about how Jupiter's magnetic field is generated. Image via NASA Goddard Space Flight Center

Boom! Juno within Jupiter’s magnetosphere

In late June, as Juno crossed into Jupiter’s magnetic field, an instrument aboard the craft recorded the bow shock. Hear it here.

Image of green galaxy from EAGLE simulation. Credit: James Trayford/EAGLE/Durham University

What makes some galaxies green?

State-of-the-art computer simulations let scientists figure out why some galaxies are green. They said a green color for a galaxy might reveal a troubled past.

The Spiderweb Galaxy as seen by the Hubble Space Telescope (optical) in red, the Very Large Array (radio) in green and the Atacama Large Millimeter/submillimeter Array (submillimeter) in blue.  See annotated image below. Image via NASA, ESA-Hubble, STScI, NRAO, ESO.

Surprise dew drops for Spiderweb Galaxy

Astronomers using the ALMA telescope to study the Spiderweb Galaxy unexpectedly found droplets of condensed water at the galaxy’s outskirts.

Just 15 minutes after its closest approach to Pluto on July 14, 2015, NASA’s New Horizons spacecraft looked back toward the sun and captured this near-sunset view of the rugged, icy mountains and flat ice plains extending to Pluto’s horizon. The smooth expanse of the informally named icy plain Sputnik Planum (right) is flanked to the west (left) by rugged mountains up to 11,000 feet (3,500 meters) high, including the informally named Norgay Montes in the foreground and Hillary Montes on the skyline. To the right, east of Sputnik, rougher terrain is cut by apparent glaciers. The backlighting highlights over a dozen layers of haze in Pluto’s tenuous but distended atmosphere. The image was taken from a distance of 11,000 miles (18,000 kilometers) to Pluto; the scene is 780 miles (1,250 kilometers) wide. View larger. | Image credit: NASA/JHUAPL/SwRI

Pluto spacecraft gets new mission

Plus the Dawn spacecraft will remain at Ceres, and 7 other NASA craft have the green light for continued operations through fiscal years 2017 and 2018.

Image via Debbie Lewis

Asteroid Day 2016 is June 30

Hundreds of events – films, concerts, panels with engineers, scientists and astronauts – about asteroids and how to protect our planet from asteroid impacts.

Fallen trees at Tunguska.  This image is from 1927, when Russian scientists were finally able to get to the scene.  Photograph from the Soviet Academy of Science 1927 expedition led by Leonid Kulik.

Today in science: The Tunguska explosion

On June 30, 1908, an explosion over Siberia killed reindeer and flattened trees. But no crater was ever found. It may have been a small asteroid.

Image via Las Cumbres Observatory

Join astronomers in tracking asteroids

Sign up to trigger asteroid observations on a global telescope network on Asteroid Day, June 30. Anyone can help! Sign up by 00:00 UTC on July 1.