New thruster design increases efficiency for future spaceflight

Hall thrusters (HTs) are used in earth-orbiting satellites, and also show promise to propel robotic spacecraft long distances, such as from Earth to Mars. The propellant in a HT, usually xenon, is accelerated by an electric ...

Star formation in the outskirts of galaxies

Star formation environments can be roughly grouped into three types, categorized by the density of their gas (or more precisely, the projected "surface" density of the gas, which is easier to determine than the conventional ...

How strong is gravity on other planets?

Gravity is a fundamental force of physics, one which we Earthlings tend to take for granted. You can't really blame us. Having evolved over the course of billions of years in Earth's environment, we are used to living with ...

Planetary influences on young stellar disks

A newborn star typically has a disk of gas and dust from which planets develop as the dust grains collide, stick together and grow. Stars older than about five million years lack evidence for these disks, however, suggesting ...

Trapping climate pollutant methane gas in porous carbon

As talks of global warming are once again making headlines, scientists have renewed their efforts to understand how to best limit its effects. For example, sequestrating short-lived climate pollutants, such as methane and ...

What is the biggest planet in the solar system?

Ever since the invention of the telescope four hundred years ago, astronomers have been fascinated by the gas giant of Jupiter. Between it's constant, swirling clouds, its many, many moons, and its Giant Red Spot, there are ...

Study of vehicle emissons will aid urban sustainability efforts

Vehicles churn out about 28 percent of the carbon dioxide (CO2) generated from fossil fuels in the United States, and their contribution keeps climbing, particularly in urban areas. But planners and policymakers have lacked ...

Methane storage targets are too high

Using natural gas for car fuel is a challenge, requiring massive research efforts to find materials that can efficiently store it. However, a Swiss-US study concludes that the best materials have not only been already discovered, ...

Voyager 1 magnetic data surprise intrigues researchers

(Phys.org) —A University of Alabama in Huntsville graduate student and a recent UAH doctoral graduate are exploring surprising data from Voyager 1's crossing of the heliopause into the interstellar medium of our galaxy.

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