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Category: space – Page 319

The absence of the 21-centimeter hydrogen line allowed scientists to determine specific properties of the earliest galaxies in the universe.

An international group of astronomers, led by scientists at the University of Cambridge, just shed new light on the cosmic dawn of the universe, a press statement reveals.

The cosmic dawn is a very early period of the universe, during which the first stars and galaxies formed. The researchers used data from India’s SARAS3 radio telescope to analyze this period of the cosmos and determine mass and energy output limits for the first stars and galaxies.

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Today, Mars is colloquially known as the ‘Red Planet’ on account of how its dry, dusty landscape is rich in iron oxide (aka. ‘rust’). In addition, the atmosphere is extremely thin and cold, and no water can exist on the surface in any form other than ice.

But as the Martian landscape and other lines of evidence attest, Mars was once a very different place, with a warmer, denser atmosphere and flowing water on its surface.

For years, scientists have attempted to determine how long natural bodies existed on Mars and whether or not they were intermittent or persistent.

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The rover is expected to be larger than the two China-operated rovers on the Moon earlier. Wu claimed that nuclear energy could also be used to power the hopper, a machine intended to lift off from the lunar surface numerous times and bounce in and out of a crater’s constantly shadowed section in search of water.

Nuclear energy will support the station’s communications facilities to maintain communication with Earth and power the station’s communications systems. It will also stay connected to the Earth and relay signals between the Earth, Mars, and deep space. China has also announced its desire to explore deep space.

“China was the first country to propose building such a research station at the lunar South Pole,” Wu said. At the latitude of about 89 degrees south, he said there could be 180 consecutive days of light to sustain extended operations for both instruments and astronauts.

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The merging of two neutron stars emits both light and gravitational waves at the same time, so if gravity and light have the same speed, they should be detected on Earth at the same time. Given the distance of the galaxy that housed these two neutron stars, we know that the two types of waves had traveled for about 130 million years and arrived within two seconds of one another.

So, that’s the answer. Gravity and light travel at the same speed, determined by a precise measurement. It validates Einstein once again, and it hints at something profound about the nature of space. Scientists hope one day to fully understand why these two very different phenomena have identical speeds.

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The latest data improves our understanding of how clouds in “hot Jupiter” exoplanets like this might appear up close. They are likely to be broken up, rather than a single, uniform blanket over the planet.

Photochemistry is the result of light triggering chemical reactions. This process is fundamental to life on Earth: it makes ozone, for example, which protects us from harsh ultraviolet (UV) rays.

New observations of WASP-39 b, a Jupiter-sized planet orbiting a Sun-like star found 700 light years away, confirm the presence of a never-before-seen molecule in the atmosphere – sulfur dioxide – among other details.

The James Webb Space Telescope has previously studied WASP-39 b. In August, it captured the first clear evidence for carbon dioxide. Now, it has focused its array of highly sensitive instruments on the planet once again, revealing not just an isolated ingredient, but a full menu of atoms, molecules, and even signs of active chemistry and clouds in the broiling atmosphere. This latest data, far more detailed than any previous telescope, shows the amazing capabilities of Webb, and hints at the potential for future discoveries that may reveal biosignatures.

Continue reading “Photochemistry is confirmed on an exoplanet” | >

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I’m going to tell you about the craziest proposal for an astrophysics mission that has a good chance of actually happening. A train of spacecraft sailing the sun’s light to a magical point out there in space where the Sun’s own gravity turns it into a gigantic lens. What could such a solar-system-sized telescope do? Pretty much anything. But definitely map the surfaces of alien worlds.

Continue reading “The REAL Possibility of Mapping Alien Planets!” | >

In space — Recent (China Manned Space Agency — No access Chinese mainland) 1. Various of Shenzhou-14 astronaut Cai Xuzhe unpacking packages 2. Various of Shenzhou-14 crew checking facilities, opening boxes and inspecting equipment 3. Shenzhou-14 crew installing and trying out microgravity resistance exercise device 4. Shenzhou-14 astronaut Liu Yang exercising with microgravity resistance exercise device.

The Shenzhou-14 astronauts have completed several missions over the last two weeks, including the installation of equipment in the work area of the Mengtian lab module which they entered for the first time on Nov. 3. Among the scientific and basic living equipment, the astronauts have also set up a small home gym to help them stay fit. The crew members-Chen Dong, Liu Yang and Cai Xuzhe can now keep fit in the lab with a special microgravity resistance exercise device similar to a rowing machine with which astronauts can do squats, heel lifts, hard pulls, rowing and shoulder exercise. Resistance exercise is especially important for astronauts living in zero gravity conditions which can rapidly reduce muscle mass and bone density.

On Sunday, the trio entered the Tianzhou-5 cargo craft to fetch supplies for the Tiangong space station.

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playlist.

This series looks at devices and concepts we may see in future conflicts, and we will look at both hypothetical technologies and those limitations placed on us by fighting in space, for instance, rather than on the ground.

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