Universe Today

April 17, 2021April 17, 2021 by Brian Koberlein

You Thought Black Hole Event Horizons Looked Strange. Check out Binary Black Hole Event Horizons

The lensing effects can be complex and difficult to calculate. Credit: NASA’s Goddard Space Flight Center/Jeremy Schnittman and Brian P. Powell

One of the strangest predictions of general relativity is that gravity can deflect the path of light. The effect was first observed by Arthur Eddington in 1919. While the bending effect of the Sun is small, near a black hole light deflection can be significant. So significant that you need a powerful supercomputer to calculate how light will behave.

April 16, 2021April 16, 2021 by Andy Tomaswick

Astronauts Will Soon be Getting a Space Fridge, Keeping Everything Cold in Zero-G

Purdue University researchers Eckhard Groll (left) and Leon Brendel stand next to a fridge experiment they designed to work in different orientations – even upside down. (Purdue University photo/Jared Pike)

One of the least known of NASA’s funding mechanisms is the Small Business Innovation Research (SBIR) program. This program, required by the Baye-Doyle Act of 1980, earmarks a piece of every US Federal agency’s budget (including NASA) for the development of small businesses to commercialize new technologies. NASA’s SBIR program usually focus on commercializing technologies that are useable in space, and many times fund a university doing some work in addition to the small business that received the grant. A company called Air Squared Inc, based in Broomfield, Colorado, recently received one of these SBIR grants, and teamed up with a mechanical engineering lab at Purdue University and Whirlpool, one of the world’s appliance giants, to produce a necessary component for any long-term space mission – a refrigerator.

April 16, 2021April 16, 2021 by Andy Tomaswick

Biden Administration is Looking for a 6.3% Increase in NASA’s Budget for 2022

Space research, like much else in capitalist societies, is driven by funding. The biggest source of that funding for that space research is usually the US government. Which is why, when US presidents release their budget proposals, the space community takes notice. Especially because that budget affects NASA, the largest space funding agency in the world. With a new year and new administration comes a new budget and with the 2021 proposed budget comes a nice funding increase for NASA.

April 16, 2021April 16, 2021 by Andy Tomaswick

Citizen Scientists Discover a new Feature in Star Formation: “Yellowballs”

AI is often touted as being particularly good at finding patterns amongst reams of data. But humans also are extremely good at pattern recognition, especially when it comes to visual images. Citizen science efforts around the globe leverage this fact, and recent results released from the Milky Way Project on Zooinverse show how effective it can be. The project’s volunteer team identified 6,176 “yellowballs”, which are a stage that star clusters go through during their early years. That discovery helps scientists better understand the formation of these clusters and how they eventually grow into individualized stars.

April 15, 2021April 15, 2021 by Scott Alan Johnston

Ground-Based Lasers Could Push Space Debris off Collision-Course Orbits

Researchers at the Australian National University (ANU) are finding new uses for the laser-based technology that sharpens telescope imagery – called adaptive optics – and it just might help mitigate the world’s growing space debris problem. Purpose-built lasers could give derelict satellites a slight ‘push’ of photons, imparting just enough energy to change the debris’s orbit and prevent an impending collision.

April 14, 2021April 14, 2021 by Matt Williams

If you Want to Move an Asteroid, you Need the Right Kind of Nuclear Explosion

Artist's concept of a large asteroid passing by the Earth-Moon system. Credit: A combination of ESO/NASA images courtesy of Jason Major/Lights in the Dark.

Using nuclear devices to deflect or disrupt an asteroid. Sounds a bit crazy, no? Maybe a little too Hollywood? And yet, detonating nukes in space may be necessary someday for the sake of planetary defense. In order for this method to be effective, scientists need to work out all the particulars in advance. That means knowing how much force will be necessary depending on the mass and trajectory of the asteroid.

Recently, a research collaboration between Lawrence Livermore National Laboratory (LLNL) and the Air Force Institute of Technology (AFIT) investigated how the energy output of a nuclear detonation could affect the path of an asteroid. This consisted of modeling different nuclear reactions (fission or fusion) to determine the neutron energy generated, which could potentially pave the way for a new type of asteroid redirect mission (ARM).

April 14, 2021April 14, 2021 by Brian Koberlein

Finding Oxygen on an Alien World Doesn't Always Mean There's Life There

Artist concept of the planetary system Kepler 62. Credit: Danielle Futselaar - SETI Institute

We now know the universe is filled with planets. By one estimate, there are more than 20 billion Earth-like worlds in our galaxy alone. But how many of them are likely to have life? And how would we know if they do? Unless they happen to send us a very clear message directly, the most likely way we’ll discover exoplanet life is by looking at their atmospheres.

April 14, 2021April 14, 2021 by Nancy Atkinson

100-meter Asteroid Created a Strange Impact Event in Antarctica 430,000 Years Ago

Mocked up illustration of touchdown impact on Antarctica. Credit: Mark A. Garlick.

The effects of ancient asteroid impacts on Earth are still evident from the variety of impact craters across our planet. And from the Chelyabinsk event back in 2013, where an asteroid exploded in the air above a Russian town, we know how devastating an “airburst” event can be.

Now, researchers in Antarctica have discovered evidence of a strange intermediate-type event – a combination of an impact and an airburst. The event was so devastating, its effects are still apparent even though it took place 430,000 years ago.

April 14, 2021April 15, 2021 by David Dickinson

Galileo Sunspot Sketches Versus Modern ‘Deep Learning’ AI

A new study turns modern ‘deep learning’ techniques on Galileo’s early sketches of the Sun.

It’s a fascinating thought to consider.

What exactly did the Sun look like, centuries ago? What would we see, if astronomers back in the time of Kepler and Galileo had modern technology monitoring the Sun across the electromagnetic spectrum, available to them?

April 13, 2021April 13, 2021 by Nancy Atkinson

Earth Gains 5,200 Tons of Dust From Space Every Year

Electron micrograph of a Concordia micrometeorite extracted from Antarctic snow at Dome C. Credit and copyright: Cécile Engrand/Jean Duprat.

Whenever I wipe the dust off my coffee table or catch a glimpse of dust motes floating in sunlight, my spacey mind always wonders, is any of that cosmic dust?

It just might be. But the amount of space dust that lands on our planet every year might surprise you.