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NASA picks Lockheed Martin to build a rocket that will return from Mars – Yahoo Movies Canada

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The Perseverance rover is a capable machine, but one thing it can’t do is send rock, sediment and atmospheric samples from Mars back to Earth by itself. NASA hopes to retrieve some of those through its Mars Sample Return Program, and it’s taken another step forward in the project. The agency has chosen Lockheed Martin to build the first rocket to be fired off another planet.

The Mars Ascent Vehicle (MAV) will be a small, lightweight rocket and is a crucial component of NASA’s ambitious plan. “This groundbreaking endeavor is destined to inspire the world when the first robotic round-trip mission retrieves a sample from another planet — a significant step that will ultimately help send the first astronauts to Mars,” NASA Administrator Bill Nelson said in a statement.

A Sample Retrieval Lander will take the MAV to the surface of Mars. It will land in or close to Jezero Crater, where Perseverance landed last February.

The lander will act as the launch platform for the MAV. Once the MAV is in orbit, the plan is for a European Space Agency Earth Return Orbiter equipped with NASA’s Capture, Containment and Return System payload to capture the rocket. The aim is to bring the samples back to Earth by the mid-2030s.

“We are nearing the end of the conceptual phase for this Mars Sample Return mission, and the pieces are coming together to bring home the first samples from another planet,” Thomas Zurbuchen, associate administrator for science at NASA headquarters, said. “Once on Earth, they can be studied by state-of-the-art tools too complex to transport into space.”

Lockheed Martin will deliver multiple MAV test units and a flight unit to NASA. The contract, which is worth up to $194 million, calls for the company to design, develop, test and evaluate the integrated MAV system, and to design and develop the ground support equipment.

Not only does the MAV need to be able to tolerate the Martian environment and be compatible with several types of spacecraft, it needs to be small enough to squeeze inside the Sample Retrieval Lander. It’s a tough challenge, but Lockheed Martin has several years to figure things out. The lander won’t launch before 2026.

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Young Jupiter likely gobbled up millions of planetoids – The Weather Network

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New research suggests that Jupiter contains the remnants of numerous planetoids that it consumed as it grew in the early solar system.

Jupiter is the largest and most massive planet in our solar system, tipping the cosmic scales at over 317 times the mass of Earth. Most of its bulk is made up of just two elements — hydrogen and helium. However, a small percentage of the planet is composed of heavier elements, all of which astronomers group together into the category of metals.

This artist impression shows dark scars in Jupiter’s clouds due to shards of Comet Shoemaker-Levy 9 impacting the planet in 1994. Credit: ESO/M. Kornmesser/NASA/ESA


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This same distinction is used in stellar astronomy, where a star is described as having a specific metallicity, which refers to the amount of stuff in the star that is not hydrogen or helium.

New research has used data from NASA’s Juno probe to investigate Jupiter’s metallicity.

As Juno orbits around Jupiter, it makes periodic close passes over the planet’s cloud-tops. During each of these passes, the spacecraft keeps careful record of the gravitational pull it experiences due to the material underneath it. This gives researchers an idea of exactly how much stuff is under Jupiter’s clouds in different regions of the planet.

Using this data, an international team led by Yamila Miguel, from the Dutch national expertise institute for scientific space research (SRON) and the Leiden Observatory, constructed computer models of Jupiter’s interior to account for what Juno recorded.

Their study revealed some unexpected details about the massive gas giant.

Jupiter Juno NASA-JPL-Caltech-SwRI-MSSS-TanyaOleksuikThis view of Jupiter’s cloud tops was taken by NASA’s Juno spacecraft as it made its 31st close-pass around the planet. Credits: NASA/JPL-Caltech/SwRI/MSSS, processed by citizen scientist Tanya Oleksuik (CC BY-NC-SA 3.0)


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Firstly, the distribution of the metals within Jupiter is not uniform. Instead, they are more concentrated the deeper into the planet you go. While heavier elements do tend to sink towards a planet’s core, this discovery is unusual because it was assumed that the motions of Jupiter’s atmosphere would cause the metals to be more evenly distributed.

“Earlier we thought that Jupiter has convection, like boiling water, making it completely mixed,” Miguel said in a SRON press release. “But our finding shows differently.”

Secondly, the total amount of Jupiter’s metal content is somewhere between 3 to 9 per cent of the entire planet, or roughly equivalent to 11-30 times the mass of Earth. That’s a lot of heavy elements for the planet to consume in a relatively short time.

“There are two mechanisms for a gas giant like Jupiter to acquire metals during its formation: through the accretion of small pebbles or larger planetesimals,” Migel said.

Planetesimals (aka planetoids) are solid chunks of rock and/or ice that formed in the early solar system. This includes asteroids and comets larger than 1 kilometre across, but smaller than 100 km. Anything larger would be an ’embryonic planet’ or ‘protoplanet’, while objects smaller than 1 km would be considered ‘pebbles’.

Watch below: NASA Juno spots exotic SHALLOW LIGHTING on Jupiter

According to Migel, once a ‘baby’ planet grows massive enough, its gravity tends to snag the smaller pebbles and fling them out of the way. Thus, by the time Jupiter accumulated enough mass to develop its hydrogen-helium atmosphere, its own gravity would have blocked it from consuming these tiny objects.

However, as the researchers note in the paper, their results
indicate that Jupiter continued to accumulate heavy elements, in large amounts, while its hydrogen-helium envelope was still growing. So, a significant amount of the planet’s metals had to come from larger objects.

“Planetesimals are too big to be blocked, so they must have played a role,” Migel said.

So, how many planetesimals has Jupiter eaten?

If we use some typical asteroid masses from NASA, to account for up to 30 Earth-masses worth of metals, Jupiter would have had to gobble up somewhere between a few hundred million larger ones to billions of smaller ones!

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Five planets are lining up in the sky in June and will peak tonight. Here's how to see it. – CBS News

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Five planets are moving into a rare alignment, which will be visible from Earth this week. Mercury, Venus, Mars, Jupiter and Saturn are lining up — in that order — for the first time since December 2004. On Friday, June 24, the phenomenon will be the most visible to stargazers.

While it is common to see a conjunction of three planets close together, seeing five is rare, according to Sky & Telescope. The planets are lining up in their natural order from the Sun, which is also remarkable, says the science magazine published by American Astronomical Society.

The five so-called “naked-eye” planets were visible beginning on June 3 and 4, and the lineup could be seen with binoculars — but only for about half an hour, before Mercury was lost in the glare of the sun. 

Sky & Telescope says the best time to see the the planets line up on June 24 is 45 minutes before sunrise. It should be visible on the eastern horizon. 

Sky & Telescope


But on June 24, viewing will be optimal. Even if the distance between Mercury and Saturn increases, it’s getting easier to spot Mercury, so it is getting progressively easier to see all five planets, Diana Hannikainen, observing editor of Sky & Telescope, told CBS News via email. 

Hannikainen said the sky on the morning of the 24th “will present a delightful sight” because the waning crescent moon will also join the procession between Venus and Mars. 

The planets should be visible on the days leading up to this. Sky & Telescope says the best time to see the line up on June 24 is 45 minutes before sunrise. It should be visible on the eastern horizon. 

Four of the naked-eye planets have been lining up in the for the past few months, according to NASA. But over the next few months, Saturn, Mars, Jupiter and Venus will spread out. By September, Venus and Saturn will no longer be visible to most observers. 

Another astronomical phenomenon will be visible in June: the M13 globular star cluster, a tightly packed spherical collection of stars. The M13, also known as the Hercules Cluster, contains thousands of stars, which are thought to be around 12 billion years old — almost the age of the universe itself, NASA says.

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Clear skies across mid-Island allowing for unobstructed view of rare planetary alignment – Nanaimo News NOW

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No special equipment is needed to spot the stellar phenomena, with all being easily bright enough to be visible with the naked eye.

Arkos said they’ll even be visible in more populated city areas, although he suggested getting away from light pollution for the best effect.

“Just before the sun comes up is when you have your best chance to catch all of these planets,” Arkos added. “The trickiest one is going to be Mercury because it’s very close to the sun in the sky so you have to wait literally until the sun is just about to rise to catch a glimpse of Mercury in the glow of the sun.”

The event peaks ahead of sunrise on Friday, meaning those wanting to catch a glimpse should set an alarm for 4 a.m. and be in position by 4:30 a.m. looking eastward.

A clear view of the sky to the horizon from the northeast to southeast is key.

With little cloud in the forecast, stargazers will have the opportunity to see variations of the alignment with the moon until June 27th.

The planetary alignment will be visible in varying degrees until July 6 when Mercury will disappear in the light of the sun.

“You’ll see them shifting as time goes on because of course they move at different rates in the sky so they won’t maintain that particular configuration exactly, it’ll change over time,” Arkos said.

Following this planetary alignment event, the attention of Arkos and his fellow astronomers turns to the James Webb deep space telescope, due to release its first official images on July 12.

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