Nancy Atkinson, Author at Universe Today

October 17, 2020October 17, 2020 by Nancy Atkinson

Great Barrier Reef Has Lost Half of its Coral Over the Last 25 Years

Great Barrier Reef, Queensland, Australia August 1992

A new study found that warmer ocean temperatures driven by climate change have caused Australia’s Great Barrier Reef to lose more than half of its corals since 1995. The researchers say virtually all coral populations along the Great Barrier Reef have declined due to repeated “bleaching events” in the past 25 years. They said the devastation of the coral will continue unless action is taken to mitigate the causes of a warming climate.

October 16, 2020March 8, 2021 by Nancy Atkinson

Summer is Dust Devil Time on Mars

Dust devil dance on Mars. Credit: NASA/JPL/UArizona

Just like Earth, Mars undergoes seasonal changes due to its axial tilt. And while summer heat on Mars can’t compare with Earth’s, along with the Martian summer warmth comes an increase in small whirling storms known as dust devils.

October 13, 2020October 13, 2020 by Nancy Atkinson

This is a Landslide… on the Moon

Mass movement of rocky debris down the inner crater wall and onto the floor of Kepler crater. Image width 3 kilometers, north is up, Credit: NASA/GSFC/Arizona State University.

Landslides bringing you down?

Landslides can be found all across our own planet Earth, on all seven continents plus the ocean floors. Similar large mass movements have been spotted around the Solar System on rocky worlds, including our companion, the Moon.

This image from the Lunar Reconnaissance Orbiter (LRO) shows an example of lunar landslides, with translational slides of regolith on the walls of Kepler Crater.

October 9, 2020October 9, 2020 by Nancy Atkinson

Simulation Helps Explain Saturn’s Mysterious Hexagon

The smaller storms on Saturn interact with the larger system and as a result effectively pinch the eastern jet and confine it to the top of the planet. The pinching process warps the stream into a hexagon. Credit: Jeremy Bloxham and Rakesh K. Yadav

A new study of the mysterious hexagon-shaped storm at Saturn’s north pole suggests this phenomenon is actually the result of activity occurring across the entire planet.

October 6, 2020October 6, 2020 by Nancy Atkinson

The Colorful Walls of an Exposed Impact Crater on Mars

A view of the interior of an impact crater on Mars shows prominent bright layer of bedrock. Credit: NASA/JPL/UArizona

Impact craters have been called the “poor geologists’ drill,” since they allow scientists to look beneath to the subsurface of a planet without actually digging down. It’s estimated that Mars has over 600,000 craters, so there’s plenty of opportunity to peer into the Red Planet’s strata – especially with the incredible HiRISE (High Resolution Imaging Science Experiment) camera on board the Mars Reconnaissance Orbiter which has been orbiting and studying Mars from above since 2006.

October 5, 2020October 5, 2020 by Nancy Atkinson

What the Astronauts Saw as They Orbited the Moon During Apollo 17

The crescent Earth rises above the lunar horizon in this spectacular photograph taken by the Apollo 17 crew in lunar orbit in December, 1972, during NASA’s final lunar landing mission in the Apollo program. Credit: NASA. Image editing and enhancement: Kevin Gill.

This view always gets me *right there.* But this new version really gets me.

This is what Apollo 17 astronauts saw in December of 1972 as they came around the farside of the Moon: the blue and white crescent Earth rising above the stark lunar horizon. And now image editing guru Kevin Gill has sharpened the image, giving it more texture, color and contrast. I can imagine this sharp, spectacular view must be close to what the astronauts saw with their own eyes.

“There I was, and there you are, the Earth – dynamic, overwhelming…” said Apollo 17 astronaut Gene Cernan.

September 30, 2020September 30, 2020 by Nancy Atkinson

A Galaxy has been Found That’s as Bright as a Quasar… But it’s Not a Quasar

Image of the region of the sky containing BOSS-EUVLG1 and artist`s drawing of the burst of star formation in BOSS-EUVLG1. Credit: DESI Legacy Imaging Surveys/Gabriel Pérez Díaz, SMM (IAC).

Astronomers have found a new type of galaxy that is very old, very distant and very bright in ultraviolet light. This is somewhat an unusual combination, and so when this bright galaxy was first detected, the team of researchers who found it first thought it was a quasar. But detailed study revealed it was actually a galaxy with some other unusual features, which contributes to its brightness: it is busy with star formation, it has almost no dust.

As of now, this galaxy – with the license plate-type name of BOSS-EUVLG1 – appears to be the only one of its kind.

September 29, 2020September 29, 2020 by Nancy Atkinson

We Might Have a New Mini-Moon Soon

A view of object 2020 SO's orbit, currently near to lock step with Earth. Screenshot from JPL's Small Body Database.

Is it a new asteroid mini–moon or a human-made mini-moon? That’s the question about a small object approaching Earth, called 2020 SO. NASA’s Small Body Database predicts the object will captured by Earth’s gravity in October 2020 and temporarily be trapped in orbit.

September 28, 2020September 28, 2020 by Nancy Atkinson

Video Shows a Meteoroid Skipping off Earth’s Atmosphere

Here’s something we don’t see very often: an Earth-grazing meteoroid.

On September 22, 2020, a small space rock skipped through Earth’s atmosphere and bounced back into space. The meteoroid was spotted by the by a camera from the Global Meteor Network, seen in the skies above Northern Germany and the Netherlands. It came in as low as 91 km (56 miles) in altitude – far below any orbiting satellites – before it skipping back into space.

September 25, 2020September 25, 2020 by Nancy Atkinson

Astronauts are Getting a New Toilet Next Week

The International Space Station in orbit round Earth. Credit: NASA

When astronauts have to go, NASA wants them to boldly go.

A new space toilet is heading to the International Space Station, with official name “Universal Waste Management System” (UWMS). (If it’s NASA, there has to be an acronym). The new toilet is smaller than the current toilets aboard the station, is more user-friendly, and includes 3-D printed titanium parts.