The World's Largest Liquid-Mirror Telescope Comes Online

Ask any astronomer, astrophysicist, or cosmologist, and they’ll probably tell you that a new age of astronomy is upon us! Between breakthroughs in gravitational-wave astronomy, the explosion in exoplanet studies, and the next-generation ground-based and space-based telescopes coming online, it’s pretty evident that we are on the verge of an era of near-continuous discovery! As always, major discoveries, innovations, and the things they enable inspire scientists and researchers to look ahead and take the next big step.

Take, for example, the research into liquid mirrors and advanced interferometers, which would rely on entirely new types of telescopes and light-gathering to advance the science of astronomy. A pioneering example is the newly-commissioned International Liquid Mirror Telescope (ILMT) telescope that just came online at Devasthal Peak, a 2,450 m (8,040 ft) tall mountain located in the central Himalayan range. Unlike conventional telescopes, the ILMT relies on a rapidly-rotating 4-meter (13 ft) mirror coated with a layer of mercury to capture cosmic light.

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China Announces Its New Flagship Space Telescope Mission

Artist's concept of Chinese Space Station Telescope (CSST).  Credit: Jaimito130805, CC BY-SA 4.0
Artist’s concept of the Chinese Space Station Telescope (CSST). Credit: Jaimito130805, CC BY-SA 4.0

Distant galaxies, dark matter, dark energy, and the origin and evolution of the universe itself are some of the many scientific goals of China’s newly announced space telescope. If all goes according to plan, the China Space Station Telescope (CSST) will blast off atop a Long March 5B rocket sometime in late 2023. Once in a safe orbit, CSST should begin observations in 2024. Judging by these research topics, it looks like the Chinese Academy of Sciences is throwing down an impressive scientific gauntlet for itself and its astronomers.

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Webb Has Almost Reached its Final, Coldest Temperature

Image: James Webb Space Telescope
NASA's James Webb Telescope, shown in this artist's conception, will provide more information about previously detected exoplanets. Beyond 2020, many more next-generation space telescopes are expected to build on what it discovers. Credit: NASA


Launched on December 25, 2021 from ESA’s launch site in Kourou, French Guiana aboard an Ariane 5 rocket, the James Webb Space Telescope (JWST) reached its final orbit at the L2 Lagrange point on January 24, 2022. It has since performed several operations to get it ready for its observing mission which should begin in about a month.

As part of getting it ready for its mission, NASA has been cooling off its instruments, such as the Mid-Infrared Instrument (MIRI), to operating temperatures. Now that they have reached that point, all that’s left to cool down are the mirrors.

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Space for All: Bringing Astronomy to Remote Mountain Villages in Morocco

Credit: AABACA/SSVI/IAU/Asif Astronomy Club, Al-Medhi E.

The night sky is a great lever, something that people from all walks of life have been able to look upon and draw inspiration. Unfortunately, the ability to observe the planets and stars and study the mysteries of the Universe is something that is still not open to everyone. When it comes to astronomy, there is still a problem of access, which mirrors disparities in development, education, and health outcomes worldwide.

This disparity is not only persistent when it comes to developed and developing nations, but between urban and rural communities as well. In southern Morocco, this disparity is felt by public schools in the remote villages of the Atlas Mountains. But thanks to the Asif Astronomy Club and its founder – Ph.D. student El-Mehdi Essaidi – children in these schools are getting the chance to use a professional astronomical telescope to observe the stars and planets for the first time.

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A Fleet of Space Telescopes Flying in Formation Could Reveal Details on Exoplanets

An exoplanet seen from its moon (artist's impression). Via the IAU.
An exoplanet seen from its moon (artist's impression). Via the IAU.

We’ve found thousands of exoplanets in the last couple of decades. We’ve discovered exoplanets unlike anything in our own Solar System. But even with all we’ve found, it seems like there’s more and more to discover. Space scientists of all types are always working on the next generation of missions, which is certainly true for exoplanets.

Chinese researchers are developing an idea for an exoplanet-detecting array of space telescopes that acts as an interferometer. But it won’t only detect them. The array will use direct imaging to characterize distant exoplanets in more detail.

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Next Generation Telescopes Could Search for Intelligent Civilizations Directly

An artist's illustration of the LUVOIR-A telescope concept. Image Credit: NASA

We’re still in the early days of searching for life elsewhere. The Perseverance rover is on its way to a paleo-delta on Mars to look for fossilized signs of ancient bacterial life. SETI’s been watching the sky with radio dishes, listening for signals from distant worlds. Our telescopes are beginning to scan the atmospheres of distant exoplanets for biosignatures.

Soon we’ll take another step forward in the search when new, powerful telescopes begin to search not just for life but for other civilizations.

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Smaller, Ground-Based Telescopes can Study Exoplanet Atmospheres too

An artist's illustration of exoplanet Kelt-9b. Image Credit: NASA/JPL-Caltech

The next step to understanding exoplanets is to understand their atmospheres better. Astronomers can determine a planet’s mass, density, and other physical characteristics fairly routinely. But characterizing their atmospheres is more complicated.

Astronomers have had some success studying exoplanet atmospheres, and spacecraft like the James Webb Space Telescope and the ESA’s ARIEL mission will help a lot. But there are thousands of confirmed exoplanets with many more to come, and the Webb has many demands on its time.

Can smaller, ground-based telescopes play a role in understanding exoplanet atmospheres?

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Best Image Ever Taken of Stars Buzzing Around the Milky Way’s Supermassive Black Hole

This visible light wide-field view shows the rich star clouds in the constellation of Sagittarius (the Archer) in the direction of the centre of our Milky Way galaxy. The entire image is filled with vast numbers of stars — but far more remain hidden behind clouds of dust and are only revealed in infrared images. This view was created from photographs in red and blue light and forming part of the Digitized Sky Survey 2. The field of view is approximately 3.5 degrees x 3.6 degrees.

It all began with the discovery of Sagittarius A*, a persistent radio source located at the Galactic Center of the Milky Way that turned out to be a supermassive black hole (SMBH). This discovery was accompanied by the realization that SMBHs exist at the heart of most galaxies, which account for their energetic nature and the hypervelocity jets extending from their center. Since then, scientists have been trying to get a better look at Sag A* and its surroundings to learn more about the role SMBHs play in the formation and evolution of our galaxy.

This has been the goal of the GRAVITY collaboration, an international team of astronomers and astrophysicists that have been studying the core of the Milky Way for the past thirty years. Using the ESO’s Very Large Telescope Interferometer (VLTI), this team obtained the deepest and sharpest images to date of the region around Sag A*. These observations led to the most precise measurement yet of the black hole’s mass and revealed a never-before-seen star that orbits close to it.

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Lightweight, Flexible Lens Could be the Future of Space Telescopes

Holograms are useful for more than interesting-looking baubles in gift shops.  Materials scientists have used them for applications from stress/strain gauges to data storage systems.  It turns out they would also be useful in making extraordinarily lightweight, flexible mirrors for space telescopes.  A new study led by researchers at the Rensselear Polytechnic Institue shows how that might happen.

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What Would It Take To See Artificial Lights at Proxima Centauri B?

Feature Image Description: Ecumenopolis Planet orbiting Proxima Centauri-like Red Dwarf Star - Graphics from the video game Stellaris, developed and published by Paradox Interactive. - used with permission

Is there an alien civilization next door? It’s…possible(ish). In late 2020, we discovered a signal from the direction of Proxima Centauri (not necessarily from Proxima Centauri), our closest neighbour star. Named BLC- 1 by project Break Through Listen, the signal is still being analyzed to ensure it isn’t simply an echo of our own civilization – typically what they turn out to be. But why not just directly look at planets in Proxima Centauri and see if a civilization is there?

From space, the most obvious sign somebody lives on Earth is the glow from the nightside of our planet. Our cities emit light that’s shed into the Cosmos. Problem is that our current generation of telescopes are not powerful enough to see lights on distant worlds. But several researchers are testing the capabilities of the next generation of telescopes already on the drawing board. The finding? Yes! if advanced enough…or glowy enough…we would be able to see if another civilization has the lights on at Proxima Centauri.

8k compilation of footage taken from the International Space Station orbiting above Earth’s City Lights
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