Detecting the Neutrinos From a Supernova That’s About to Explode

A composite image of SN 1987A from Hubble, Chandra, and ALMA. Image Credit: By ALMA (ESO/NAOJ/NRAO)/A. Angelich. Visible light image: the NASA/ESA Hubble Space Telescope. X-Ray image: The NASA Chandra X-Ray Observatory - http://www.eso.org/public/images/eso1401a/, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=30512379

Neutrinos are puzzling things. They’re tiny particles, almost massless, with no electrical charge. They’re notoriously difficult to detect, too, and scientists have gone to great lengths to detect them. The IceCube Neutrino Observatory, for instance, tries to detect neutrinos with strings of detectors buried down to a depth of 2450 meters (8000 ft.) in the dark Antarctic ice.

How’s that for commitment.

Continue reading “Detecting the Neutrinos From a Supernova That’s About to Explode”

Deep Down in Ocean Worlds, it’s Difficult to Tell Where the Oceans End and the Rock Begins

This artist’s concept shows a hypothetical planet covered in water around the binary star system of Kepler-35A and B. The composition of such water worlds has fascinated astronomers and astrophysicists for years. (Image by NASA/JPL-Caltech.)

We all know what water is. And what rock is. The difference is crystal clear. Well, here on Earth it is.

But on other worlds? The difference might not be so clear.

Continue reading “Deep Down in Ocean Worlds, it’s Difficult to Tell Where the Oceans End and the Rock Begins”

More Evidence that Europa’s Oceans Could be Habitable

A "true color" image of the surface of Jupiter's moon Europa as seen by the Galileo spacecraft. In 2030, the Europa Clipper mission will start its close flybys of this ocean world. Image credit: NASA/JPL-Caltech/SETI Institute
A "true color" image of the surface of Jupiter's moon Europa as seen by the Galileo spacecraft. In 2030, the Europa Clipper mission will start its close flybys of this ocean world. Image credit: NASA/JPL-Caltech/SETI Institute

At first glance, Jupiter’s moon Europa doesn’t seem much like Earth. It’s a moon, not a planet, and it’s covered in ice. But it does have one important thing in common with Earth: a warm, salty ocean.

Now there’s even more evidence that Europa’s sub-surface ocean is habitable.

Continue reading “More Evidence that Europa’s Oceans Could be Habitable”

How an Advanced Civilization Could Exploit a Black Hole for Nearly Limitless Energy

This artist’s impression shows the surroundings of a supermassive black hole, typical of that found at the heart of many galaxies. The black hole itself is surrounded by a brilliant accretion disc of very hot, infalling material and, further out, a dusty torus. There are also often high-speed jets of material ejected at the black hole’s poles that can extend huge distances into space. Observations with ALMA have detected a very strong magnetic field close to the black hole at the base of the jets and this is probably involved in jet production and collimation.

A black hole as a source of energy?

We know black holes as powerful singularities, regions in space time where gravity is so overwhelming that nothing—not even light itself—can escape.

About 50 years ago, British physicist Roger Penrose proposed that black holes could be a source of energy. Now, researchers at the University of Glasgow in Scotland have demonstrated that it may be possible.

Continue reading “How an Advanced Civilization Could Exploit a Black Hole for Nearly Limitless Energy”

Newborn Exoplanets can be Completely Stripped of Their Atmosphere by Stars

Artist's conception of exoplanet systems that could be observed by PLAnetary Transits and Oscillations of stars (PLATO), a European Space Agency telescope. Credit: ESA - C. Carreau

Newborn exoplanets can have a tough life. They may form an atmosphere, but that atmosphere can be doomed. Their stars can emit intense X-ray and UV radiation, stripping away those atmospheres and laying their surfaces bare.

A team of researchers from the Leibniz Institute for Astrophysics looked at a family of four newborn sibling planets, and tried to understand how their star strips away their gaseous envelopes.

Continue reading “Newborn Exoplanets can be Completely Stripped of Their Atmosphere by Stars”

Finally! Mars InSight’s Mole is Now Underground

On June 4th NASA reported that the Mole is finally making some headway. But the instrument is not producing any science yet. Image Credit: NASA/DLR/JPL

It looks like the InSight Lander’s Mole instrument is making some progress. After months of perseverance, the team operating the instrument has succeeded in getting the Mole at least some distance into the ground.

That’s a victory in itself, considering all the setbacks there’ve been. But it’s too soon to celebrate: there’s quite a ways to go before the Mole can deliver any science.

Continue reading “Finally! Mars InSight’s Mole is Now Underground”

Black Hole Seen Blasting Out Jets at Close to the Speed of Light

MAXI J1820+070 is a binary pair that has one black hole and one star. The black hole is emitting relativistic jets, and Chandra made a movie of it. Image Credit: Chandra X-Ray Observatory

The Chandra X-Ray Observatory has spotted a distant black hole shooting out jets of material, at close to the speed of light. No worries, this beast is about 10,000 light years away from us. It’s more of a spectacle than a danger.

But it’s a spectacle laden with scientific insights.

Continue reading “Black Hole Seen Blasting Out Jets at Close to the Speed of Light”

Ocean Circulation Might Be the Key to Finding Habitable Exoplanets

Artist's depiction of a waterworld. A new study suggests that Earth is in a minority when it comes to planets, and that most habitable planets may be greater than 90% ocean. Credit: David A. Aguilar (CfA)
Artist's depiction of a waterworld. A new study suggests that Earth is in a minority when it comes to planets, and that most habitable planets may be greater than 90% ocean. Credit: David A. Aguilar (CfA)

We’ve found thousands and thousands of exoplanets now. And spacecraft like TESS will likely find thousands and thousands more of them. But most exoplanets are gassy giants, molten hell-holes, or frozen wastes. How can we find those needles-in-the-haystack habitable worlds that may be out there? How can we narrow our search?

Well, first of all, we need to find water. Oceans, preferably, since that’s where life began on Earth. And according to a new study, those oceans need to circulate in particular ways to support life.

Continue reading “Ocean Circulation Might Be the Key to Finding Habitable Exoplanets”

New Data Show How Phytoplankton Pumps Carbon Out of the Atmosphere at an Enormous Scale

One of the most fascinating things about planet Earth is the way that life shapes the Earth and the Earth shapes life. We only have to look back to the Great Oxygenation Event (GOE) of 2.4 billion years ago to see how lifeforms have shaped the Earth. In that event, phytoplanktons called cyanobacteria pumped the atmosphere with oxygen, extinguishing most life on Earth, and paving the way for the development of multicellular life.

Early Earth satisfied the initial conditions for life to appear, and now, lifeforms shape the atmosphere, the landscape, and the oceans in many different ways.

At the base of many of these changes is phytoplankton.

Continue reading “New Data Show How Phytoplankton Pumps Carbon Out of the Atmosphere at an Enormous Scale”

How Will Covid-19 affect the Future of Science?

The domes of the two first SPECULOOS telescopes, shortly after their installation in November 2016 at ESO's Paranal Observatory. The SPECULOOS Southern Observatory is designed to detect terrestrial exoplanets around nearby ultra cool stars and brown dwarfs. The VLT is visible in the background of this image.

The full ramifications of the recent novel coronavirus pandemic are not yet known, and probably won’t be known or even felt for quite some time. Entire industries have been shifted and shuttered over the course of only a few tumultuous weeks due to Covid-19. Some industries and professions have been able to adapt quickly, some have had to close down or to send their workers home, while others are faltering and collapsing.

Continue reading “How Will Covid-19 affect the Future of Science?”