Technology Archives

January 17, 2023February 7, 2023 by Matt Williams

New Nuclear Rocket Design to Send Missions to Mars in Just 45 Days

Artist's concept of a Bimodal Nuclear Thermal Rocket in Low Earth Orbit. Credit: NASA

We live in an era of renewed space exploration, where multiple agencies are planning to send astronauts to the Moon in the coming years. This will be followed in the next decade with crewed missions to Mars by NASA and China, who may be joined by other nations before long. These and other missions that will take astronauts beyond Low Earth Orbit (LEO) and the Earth-Moon system require new technologies, ranging from life support and radiation shielding to power and propulsion. And when it comes to the latter, Nuclear Thermal and Nuclear Electric Propulsion (NTP/NEP) is a top contender!

NASA and the Soviet space program spent decades researching nuclear propulsion during the Space Race. A few years ago, NASA reignited its nuclear program for the purpose of developing bimodal nuclear propulsion – a two-part system consisting of an NTP and NEP element – that could enable transits to Mars in 100 days. As part of the NASA Innovative Advanced Concepts (NIAC) program for 2023, NASA selected a nuclear concept for Phase I development. This new class of bimodal nuclear propulsion system uses a “wave rotor topping cycle” and could reduce transit times to Mars to just 45 days.

January 8, 2023January 9, 2023 by Matt Williams

Is Space Power a Good Idea? A New Spacecraft is Going to Find Out!

Artist's impression of the Caltech Space Solar Power Demonstrator (SSPD), Credit: Caltech

Solar power, long considered the leading contender among renewable energy sources, has advanced significantly over the past few decades. The cost of manufacturing and installing solar panels has dropped considerably, and efficiency has increased, making it price competitive with coal, oil, and fossil fuels. However, some barriers, like distribution and storage, still prevent solar power from being adopted more aggressively. In addition, there’s the ever-present issue of intermittency, where arrays cannot collect power in bad weather and during evenings.

These issues have led to the concept of space-based solar power (SBSP), where satellites equipped with solar arrays could gather solar energy twenty-four hours a day, seven days a week, three-hundred and sixty-five days a year. To test this method, researchers at the California Institute of Technology (Caltech) recently launched a technology demonstrator to space. It’s called the Space Solar Power Demonstrator (SSPD), which will test several key components of SBSP and evaluate the method’s ability to harvest clean energy and beam it back to Earth.

December 21, 2022December 21, 2022 by Matt Williams

NASA Just Tested a new Engine That Will Launch Artemis V and Beyond

NASA conducts an RS-25 hot fire on the Fred Haise Test Stand at Stennis Space Center in south Mississippi on Dec. 14. Credit: NASA/SSC

On November 16th, NASA launched the first mission of the Artemis Program (Artemis I), which splashed down three and a half weeks later. This uncrewed mission saw the Space Launch System (SLS) send an Orion spacecraft far beyond the orbit of the Moon, establishing a new record for distance traveled by a mission and the amount of time spent beyond Low Earth Orbit (LEO). Powering the core stage of the SLS were four Aerojet Rocketdyne RS-25s, the same engines used by the Space Shuttle – known as the Space Shuttle Main Engine (SSME).

By the end of the decade, NASA plans to mount a total of six Artemis launches that will include crewed missions to the surface, the creation of the Artemis Basecamp, and the deployment of the Lunar Gateway. NASA also plans to upgrade key components in the mission architecture along the way, which include replacing the Space Shuttle Era engines with the newly-designed RS-25E. On December 14th, NASA tested this engine for the first time at the Stennis Space Center in Mississippi, completing a hot fire test that lasted for just under three and a half minutes (209.5 seconds).

December 15, 2022December 27, 2022 by Matt Williams

Birds use Dynamic Soaring to Pick Up Velocity. We Could Use a Similar Trick to Go Interstellar

The Solar Sail demonstration mission. Credit: NASA

To stand on a coastal shore and watch how eagles, ravens, seagulls, and crows take flight in high winds. it’s an inspiring sight, to be sure. Additionally, it illustrates an important concept in aerial mechanics, like how the proper angling of wings can allow birds to exploit differences in wind speed to hover in mid-air. Similarly, birds can use these same differences in wind speed to gain bursts of velocity to soar and dive. These same lessons can be applied to space, where spacecraft could perform special maneuvers to pick up bursts of speed from “space weather” (solar wind).

This was the subject of a recent study led by researchers from McGill University in Montreal, Quebec. By circling between regions of the heliosphere with different wind speeds, they state, a spacecraft would be capable of “dynamic soaring” the same way avian species are. Such a spacecraft would not require propellant (which makes up the biggest mass fraction of conventional missions) and would need only a minimal power supply. Their proposal is one of many concepts for low-mass, low-cost missions that could become interplanetary (or interstellar) explorers.

December 15, 2022December 15, 2022 by Nancy Atkinson

Sierra Space Inflated a Habitat to Destruction, Testing its Limits Before Going to Orbit

What’s left of Sierra Space’s LIFE Habitat test article after the Ultimate Burst Pressure Test. Credit: Sierra Space.

Normally, it would be a very bad day if your space station habitat module blew up. But it was all smiles and high-fives in mission control when Sierra Space’s LIFE habitat was intentionally over-inflated until it popped spectacularly in an Ultimate Burst Pressure (UBP) test. This video shows the moment of boom from several different viewpoints.

November 28, 2022November 28, 2022 by Evan Gough

Nature’s Ultra-Rare Isotopes Can’t Hide from this New Particle Accelerator

The Facility for Rare Isotope Beams at the University of Michigan will study rare isotopes that last only fractions of a second. Image Credit: FRIB/University of Michigan.

A new particle accelerator at Michigan State University is producing long-awaited results. It’s called the Facility for Rare Isotope Beams, and it was completed in January 2022. Researchers have published the first results from the linear accelerator in the journal Physics Review Letters.

November 25, 2022November 25, 2022 by Evan Gough

If We’re Going to Get Under the Ice on Europa, How Will We Send a Signal Back to the Surface?

Artist’s rendering of the Europa “tunnelbot.” (Credit: Alexander Pawlusik, LERCIP Internship Program NASA Glenn Research Center)

If we send some type of nuclear-powered tunnelbot to Europa to seek life under its icy shield, how will we know what it finds? How can a probe immersed in water under all that ice communicate with Earth? We only have hints about the nature of that ice, what layers it has and what pockets of water it might hold.

All we know is that it’s tens of kilometres thick and as hard as granite.

November 14, 2022November 14, 2022 by Nancy Atkinson

NASA and ULA Successfully Test a Giant Inflatable Heat Shield That Could Land Heavier Payloads on Mars

Illustration of Low-Earth Orbit Flight Test of an Inflatable Decelerator (LOFTID). Credit: NASA

A new type of heat shield was successfully tested last week, with the hopes this type of inflatable decelerator could be used in the future to land humans and large payloads on Mars or for atmospheric entry on other planets on moons.

The Low-Earth Orbit Flight Test of an Inflatable Decelerator (LOFTID) was launched aboard a United Launch Alliance (ULA) Atlas V rocket on November 10 from the Vandenberg Space Force Base in California. LOFTID was a secondary payload on the launch of the Joint Polar Joint Polar Satellite System-2 (JPSS-2) weather satellite.

October 12, 2022October 12, 2022 by Matt Williams

SpinLaunch Completes its 10th Test, Hurling Payloads for NASA and Other Companies Into the air

SpinLaunch will send payloads to orbit using a centrifuge-launched vehicle. Credit: SpinLaunch

There has been no shortage of exciting developments in the commercial space industry (aka. NewSpace) in recent years. These include the ability to retrieve and reuse rockets (in part or whole), new configurations that reduce expendability, and new engines. But beyond making rocket launches more cost-effective, several cutting-edge ideas have been brought forward to make space more accessible. These include SpinLaunch‘s concept for an electric kinetic launch system (aka. a space catapult) that can propel payloads of up to 200 kg (440 lbs) to space.

On September 27th, 2022, SpinLaunch announced the results of its tenth successful flight test of its Suborbital Mass Accelerator (SMA) at Spaceport America, New Mexico. This time, SpinLaunch sent four partner payloads to space with its Suborbital Accelerator Flight Test Vehicle, which provided valuable data about the launch environment and payload integration process. This latest successful test has placed the company and its launch system one step closer to providing low-cost and sustainable launch services for satellites and other small payloads.

September 29, 2022September 29, 2022 by Seth Lockman

Robots Might Jump Around to Explore the Moon

LEAP (Legged Exploration of the Aristarchus Plateau) is a mission concept study, funded by ESA, to explore challenging lunar terrains using ANYmal, a four-legged robot developed at ETH Zürich and its spin-off ANYbotics. Credit: ETH Zürich/Robotics Systems Labs (RSL)

How great are wheels, really? Wheels need axles. Suspension. Power of some kind. And roads, or at least swaths of relatively flat and stable terrain. Then you need to maintain all of it. Because of their cost many civilizations across human history, who knew all about wheels and axles, didn’t bother using them for transportation. Another way to look at it – much of human technology mimics nature. Of the simple machines, levers, inclined planes, wedges, and even screws are observed in nature. Why not the wheel?