Background

For decades, scientists have studied the Sun from afar, using satellites to capture images and gather data. However, no spacecraft has ever ventured close enough to directly explore our star’s enigmatic atmosphere.

The Solar Probe Plus Mission

NASA’s Solar Probe Plus mission aims to change that. Scheduled to launch in July 2018, this groundbreaking spacecraft will embark on a daring seven-year journey to the Sun. Unlike previous missions, Solar Probe Plus will not fly directly towards the Sun. Instead, it will use Venus as a gravitational slingshot, performing seven flybys over the course of its mission. Each flyby will bring the spacecraft closer to the Sun, until it finally enters the star’s corona, the outermost layer of its atmosphere, in 2024.

Scientific Objectives

The Solar Probe Plus mission has several key scientific objectives:

• Particle Measurements in Solar Wind: Scientists will study the charged particles emitted by the Sun, known as solar wind. These particles play a crucial role in space weather and can impact our planet’s magnetic field and atmosphere.
• 3-D Corona Imaging: The spacecraft will capture the first-ever three-dimensional images of the Sun’s corona, revealing its intricate structure and dynamics.
• Elemental Analysis: Solar Probe Plus will conduct an inventory of the elements present in the Sun’s atmosphere, providing insights into the star’s composition and evolution.
• Electric and Magnetic Field Measurements: The spacecraft will measure the electric and magnetic fields within the Sun’s atmosphere, helping scientists understand how these fields shape the star’s behavior.
• Radio Emissions: Solar Probe Plus will study the radio emissions from the Sun, which can provide valuable information about the star’s activity and magnetic field.

Challenges and Engineering Marvels

To survive its journey through the Sun’s extreme environment, Solar Probe Plus has been meticulously engineered to withstand:

• Energized Dust: The spacecraft must endure the bombardment of high-energy dust particles that pervade the inner solar system.
• Radiation Blasts: Solar Probe Plus will face intense radiation, including X-rays and ultraviolet radiation, that could damage its sensitive instruments.
• Extreme Temperatures: The spacecraft’s heat shield must withstand temperatures up to 2,600 degrees Fahrenheit, hotter than the surface of Venus.

Significance and Impact

The Solar Probe Plus mission is expected to revolutionize our understanding of the Sun and its impact on Earth and the solar system. By directly exploring the star’s atmosphere, scientists hope to:

• Gain insights into the fundamental processes that drive the Sun’s activity, such as solar flares and coronal mass ejections.
• Improve our ability to predict space weather events that can disrupt satellite communications and power grids.
• Understand the Sun’s role in shaping the climate and habitability of our planet.

Latest News and Updates

For the latest news and updates on the Solar Probe Plus mission, visit NASA’s website at: [Insert NASA website URL]

Unexpected Engine Firing on Soyuz Capsule

On Tuesday, an unexpected engine firing on a docked Soyuz capsule sent the International Space Station (ISS) into a different orbit. The Russian space agency Roscosmos reported that specialists are still investigating the cause of the engine start, but emphasized that the station’s crew was not in danger.

Background: Soyuz Capsules and the ISS

Soyuz capsules are Russian spacecraft that play a critical role in the operation of the ISS. They transport astronauts to and from the station and serve as “lifeboats” in case of an emergency. Typically, at least one Soyuz capsule is docked to the station at all times.

The May Soyuz Failure

In May, a Soyuz capsule failed to reach the ISS with cargo due to a major malfunction shortly after launch. The malfunction caused the craft to spin out of control and re-enter Earth’s atmosphere. This incident resulted in schedule delays for NASA and other space agencies, with astronauts forced to remain in space longer than anticipated.

Impact of the Engine Misfire

Fortunately, the ISS jolt caused by the engine misfire will not affect this week’s plans to return astronauts to Earth. NASA has confirmed that Commander Terry Virts and Flight Engineers Anton Shkaplerov and Samantha Cristoforetti will depart the station on a Soyuz craft on Thursday. Another Soyuz mission is scheduled for July.

Ongoing Investigation

Roscosmos is continuing to investigate the cause of the engine misfire. The agency has declined to identify which of the two Soyuz capsules currently docked at the station experienced the malfunction.

Safety Measures on the ISS

Despite the unexpected engine firing, the ISS remains a safe environment for astronauts. The station is equipped with multiple redundant systems and safety protocols to ensure the well-being of its crew.

Additional Details

Commander Terry Virts

Commander Terry Virts is an American astronaut who currently serves as the commander of the ISS. He has extensive experience in space, having previously participated in three space shuttle missions and one long-duration stay on the ISS.

Flight Engineers Anton Shkaplerov and Samantha Cristoforetti

Flight Engineer Anton Shkaplerov is a Russian cosmonaut who has made two previous trips to the ISS. Flight Engineer Samantha Cristoforetti is an Italian astronaut who is currently on her first mission to the ISS.

Soyuz Mission Schedule

The next Soyuz mission to the ISS is scheduled for July. This mission will deliver a new crew of astronauts to the station and return three current crew members to Earth.

The Soyuz capsule is an essential component of the ISS, providing transportation and emergency evacuation capabilities. While the recent engine misfire was a concerning incident, the ISS remains a safe and secure environment for astronauts. Roscosmos is continuing to investigate the cause of the malfunction to prevent similar occurrences in the future.

Unveiling the Moon’s Hidden Depths

The lunar surface is dotted with deep caverns and pits, holding tantalizing clues to the moon’s history and potential for future human habitation. NASA is considering a groundbreaking mission called Moon Diver, an extreme terrain rover designed to rappel into one of these lunar pits, providing humanity’s first close-up look at the moon’s subterranean realms.

Moon Diver: An Extreme Terrain Rover

Moon Diver is a concept for a robotic rover designed to explore the rugged terrain of lunar pits. Unlike any other rover sent to another world, Moon Diver will not require a ramp to roll off its lander element; instead, it is equipped with specialized capabilities for rappelling down steep slopes. A tether to the rover will provide power and communications as it descends.

Scientific Exploration of Lunar Pits

The scientific objectives of the Moon Diver mission are multifaceted. By studying the exposed rock layers within the pit walls, scientists aim to unravel the moon’s geological history, including the types, fluxes, and timescales of ancient lava eruptions. The rover’s instruments will also analyze the mineralogy and elemental chemistry of rock features, potentially revealing whether the moon ever possessed a Mars-like atmosphere.

Potential for Future Lunar Exploration

Beyond its scientific value, the Moon Diver mission also has implications for future human exploration of the moon. Lunar caverns could provide shelter for future equipment or even crewed research centers. They offer protection from radiation, micrometeorites, lunar dust, and extreme temperature fluctuations. By exploring these deep lunar pits, scientists can gain a better understanding of the potential for establishing a subterranean moon base.

Design and Capabilities of Moon Diver

Moon Diver will touch down within a few hundred feet of its target pit and act as an anchor for a smaller, two-wheeled rover called Axel. Axel will carry multiple instrument payloads, including stereo cameras for close-up imaging, a long-distance camera, a multispectral microscope, and an alpha particle x-ray spectrometer.

As Axel descends into the pit, it will operate in a manner similar to a human rappeller, swinging and tapping against the walls. The science instruments will deploy and collect data at these contact points. During the freefall portion of the descent, the rover will capture images of its surroundings.

Once it reaches the bottom of the pit, Axel will explore the cavern floor, providing humanity’s first close look at the subterranean realms of the moon. The rover carries six times as much tether as it needs, enabling it to descend to the deepest depths of the cavern and discover what lies below.

Competing for Selection

Moon Diver will be competing for selection as part of NASA’s low-cost Discovery-class mission program. If chosen, the mission would launch for the moon around 2025. Competing proposals presented at LPSC include missions to Triton, Neptune’s largest moon, and Io, Jupiter’s volcanic satellite.

Lunar Exploration: A Long-Term Goal

The Moon Diver mission is part of NASA’s long-term goal of lunar exploration. The agency plans to construct a lunar outpost in orbit around the moon and use the station as a stepping stone for crewed missions to the surface. However, before astronauts return, a small, two-wheeled rover like Moon Diver could scout out the deep lunar pits to assess their potential for future human habitation and scientific exploration.

By exploring the hidden depths of the moon, Moon Diver promises to unlock new insights into our celestial neighbor’s past and pave the way for future lunar exploration and scientific discovery.