Tag: Moon

New images of Apollo landing sites on the Moon

12:45 pm

The Lunar Reconnaissance Orbiter team have released new images of the Apollo 12, 14, and 17 landing sites on the Moon. Below is a cropped image of the Apollo 12 site, showing the trails left by astronauts Pete Conrad and Alan Bean when they walked from their lunar module to Surveyor 3, an unmanned lunar lander that had soft landed there two years earlier. The full image shows some incredible detail.

Apollo 12 landing site

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When dust, pebbles, rocks, and boulders act like liquid

3:35 pm

The science team of Lunar Reconnaissance Orbiter released an intriguing picture yesterday of what scientists call a granular flow down the side of a five mile wide crater on the far side of the moon. Looking at the image, one would swear that the darker material flowing down the slope of the crater rim is a lava flow frozen in place.

lunar granular flow

However, according to the scientists, that is not what it is. Instead, this is merely debris left behind from an avalanche.
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Did the Earth once have two moons? And did they collide?

3:44 pm

Did the Earth once have two moons?

Both satellites would have formed from debris that was ejected when a Mars-size protoplanet smacked into Earth late in its formation period. Whereas traditional theory states that the infant Moon rapidly swept up any rivals or gravitationally ejected them into interstellar space, the new theory suggests that one body survived, parked in a gravitationally stable point in the Earth–Moon system.

This new model also posits that the two moons eventually collided, producing the moon we have today.

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Junk journalism

12:50 pm

In a piece today at the Huffington Post, science journalist Seth Borenstein declares the wonders of NASA’s next mission: to send astronauts to an asteroid by 2025, as declared by President Obama.

If you believe this is going to happen, then I have a bridge I want to sell you. To do it we need a spaceship in which people can live for at least a year, and a rocket to get that ship into orbit. Not only do we not yet know how to build such a spaceship, we no longer have the capability of putting it into orbit. In case you’re unaware (Borenstein acts like he is), the space shuttle no longer exists. And under this administration and Congress, any replacement we get isn’t going to be able to launch such an interplanetary spaceship anywhere in the near future, especially faced as we are with the present federal debt.

The disgraceful thing about this article, however, is the lack of skepticism shown by Borenstein.
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Public test of privately built moon lander delayed by gyro

9:45 pm

A public test of privately built moon lander has been delayed by gyro problem. Key quote:

One customer has already bought a ticket with Moon Express, asking them to deposit a small telescope on the dark side of the Moon. Jain says the company will also offer low cost ways for anyone to use the moon as a kind of time capsule. “If something goes to the moon it stays there forever, people will pay to sends things like photos, or maybe your hair or DNA.”

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A flag in the dust

11:28 am

Bumped: I posted this essay last July 20th on the anniversary of the Apollo 11 landing on the moon. I think it is worth rereading again, even as the shuttle is about to return to Earth for the last time.

Today, July 20th, is the anniversary of the Apollo 11 landing on the Moon, the first time ever that a human being arrived on another planet. Americans love to celebrate this event, as it symbolizes one of the finest moments in our history, when we set out to achieve something truly great and noble and succeeded far better than we could have imagined. Not only did we get to the Moon as promised, over the next three and a half years we sent another five missions, each with increasingly sophisticated equipment, each sent to explore some increasingly alien terrain. Forty-plus years later, no one has come close to matching this achievement, a fact that emphasizes how difficult it was for the United States to accomplish it.

There is one small but very important detail about the Apollo 11 mission, however, that most Americans are unaware of. In mounting the American flag, the astronauts found the lunar surface much harder than expected. They had a great deal of trouble getting the flagpole into the ground. As Andrew Chaikin wrote in his book, A Man on the Moon, “For a moment it seemed the flag would fall over in front of a worldwide audience, but at last the men managed to steady it.” Then Armstrong took what has become one of the world’s iconic images, that of Buzz Aldrin standing on the lunar surface saluting the flag of the United States of America.

Aldrin saluting the flag

What people don’t know, however, is that when Armstrong and Aldrin blasted off from the lunar surface, the blast wave from the Lunar Module’s rocket knocked the flag over. As Chaikin also wrote, “Outside, a spray of gold foil and debris from the descent stage flew away in all directions. The flag toppled to the dust.”

Thus, for the last four decades this American flag, shown so proudly unfurled on the surface of the Moon, has actually been lying unceremoniously on the ground, in the lunar dust.

It might actually be possible to see this, though the photos at this time remain unclear and quite blurry.
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Second ARTEMIS space probe about to enter lunar orbit

8:27 pm

The second ARTEMIS space probe will enter lunar orbit on Sunday.

“With two spacecraft orbiting in opposite directions, we can acquire a full 3-D view of the structure of the magnetic fields near the moon and on the lunar surface,” said Vassilis Angelopoulos, principal investigator for the THEMIS and ARTEMIS missions and a professor of space physics at UCLA. “ARTEMIS will be doing totally new science, as well as reusing existing spacecraft to save a lot of taxpayer money.”

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Prime real estate

2:32 pm

The south pole of the moon

Since the 1990s, scientists have suspected that water-ice might be hidden in the forever-dark floors of the polar craters on the Moon. If so, these locations become valuable real estate, as they not only would provide future settlers water for drinking, the water itself can be processed to provide oxygen and fuel.

Moreover, the high points near these craters, including the crater rims, are hoped to be high enough so that the sun would never set or be blocked by other mountains as it made its circuit low along the horizon each day. If such a place existed, solar panels could be mounted there to generate electricity continuously, even during the long 14-day lunar night.

Below the fold is a six minute video, produced from images taken by Lunar Reconnaissance Orbiter (LRO) from February 6, 2010 to February 6, 2011, in an effort to find out if such a place actually exists. It shows how the sunlight hits the south pole across an entire year.
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Mining the moon for water and nuclear fuel

10:16 am

Mining the moon for water and fuel.

Texas-based Shackleton Energy Company has already begun operations aimed at mining the Moon within the next few years. 

The company’s plans for mining and refining operations would involve melting the ice and purifying the water, converting the water into gaseous hydrogen and oxygen, and then condensing the gases into liquid hydrogen, liquid oxygen and hydrogen peroxide, all potential rocket fuels.

Shackleton CEO Dale Tietz says the water extracted would be used almost exclusively as rocket fuel to power operations both within Low Earth Orbit (LEO) – such as space tourism and the removal of space-debris – on the Moon, and further out into space. ‘We are a for-profit business enterprise moving forward, and so we are only going there really for one reason and that is to mine, prospect mine and harvest water for rocket propellant production,’ says Tietz.

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“We stand for freedom.”

3:01 am

Kennedy's speech

Fifty years ago today, John Kennedy stood before Congress and the nation and declared that the United States was going to the Moon. Amazingly, though this is by far the most remembered speech Kennedy ever gave, very few people remember why he gave the speech, and what he was actually trying to achieve by making it.

Above all, going to the Moon and exploring space was not his primary goal.

The Context

For Kennedy — whose presidential campaign included an aggressive anti-communist stance against the Soviet Union — the months before the speech had not gone well. Five weeks earlier, for instance, the CIA-led attempt to invade Cuba and overthrow Castro’s communist government had ended in total failure. When Kennedy refused to lend direct military support to the Bay of Pigs invasion, the 1,200 man rebel force was quickly overcome. “How could I have been so stupid as to let them go ahead?” Kennedy complained privately to his advisors.

In Berlin, the tensions between the East and the West were continuing to escalate, and would lead in only a few short months to Khrushchev’s decision to build the Berlin Wall, sealing off East Berlin and the citizens of East Germany from the rest of the world.

In the race to beat the Soviets in space, things were going badly as well. NASA had announced the United States’ intention to put the first man into space sometime in the spring of 1961. The agency hoped that this flight would prove that the leader of the capitalist world still dominated the fields of technology, science, and exploration.

Originally scheduled for a March 6, 1961 launch, the short fifteen minute sub-orbital flight was repeatedly delayed. The Mercury capsule’s first test flight in January, with a chimpanzee as test pilot, rose forty miles higher than intended, overshot its landing by a hundred and thirty miles, and when the capsule was recovered three hours later it had begun leaking and was actually sinking. Then in March another test of the Mercury capsule included the premature firing of the escape rocket on top of the capsule, the unplanned release of the backup parachutes during descent, and the discovery of dents on the capsule itself.

These difficulties caused NASA to postpone repeatedly its first manned mission. First the agency rescheduled the launch to late March. Then early April. Then mid-April. And then it was too late.
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