Earth-Like World

Pictures of the Day - January 18, 2019

2nd set of pictures of this Titan-Like world.

Pictures of the day - February 10, 2019 (Late post).

Montage of lunar skies.

Split Moon. –outerspaceclothing.com–

Vernier System - Post 2 (Third Planet and its moons)

Here we come across the system’s third planet, a Jupiter-Sized gas giant 1.18 Jupiter Masses orbiting the two suns at an average distance of 2.33 AU. Four massive moon’s all with atmospheres orbit’s the giant. The planet has a very faint ring system in orbit.

High Resolution Pic of the 3rd Planet

Note, the large red nebula in the background NGC 604, one of the largest know nebulas. The Vernier System is located 4,600 light years from the nebula. From here NGC 604 covers over 16 arc degrees of the sky (36 Full-moons), and shines with an average magnitude of -1.91.

The first moon is barren with a surface covered in craters and gray-colored regolith. It is 3.4 lunar masses, with a radius of 2,603.31 km. A thin sulfur dioxide atmosphere clings to the surface. The atmosphere has a very low surface pressure of 0.0001 atmosphere’s. The moon still appears to be volcanically active.

High Resolution Pic of the 1st moon

The second moon has 4 lunar masses with a radius of 2,956.36 kilometers. It’s surface is more geologically diverse with larger quantities of iron oxide. It is more Mars-like than Lunar-like. A sulfur dioxide atmosphere also covers the surface, but is thicker with a surface pressure of 0.017 atmospheres, or roughly just under 3 times thicker than the atmosphere of Mars.

High Resolution Pic of the 2nd moon

The third satellite is by far the largest, and is an Earth-sized moon with a mass of 0.56 Earth’s and a radius 93% that of Earth. It has a thick carbon dioxide-ammonia atmosphere, with a surface pressure 3.48 times that of Earth. Weather is very active on the surface, and the temperature averaging 230 K (-45 °F) supports liquid sulfur dioxide. Sulfur dioxide rain is also common on the surface. The satellite also appears to have a magnetic field.

High Resolution Pic of the 3rd moon

The fourth moon is a second largest with a mass of 0.07 times that of Earth and a radius of 3,274.23 kilometers. It also has a thin sulfur dioxide atmosphere, and sulfur dioxide ice-caps. The atmosphere is 0.017 atmosphere’s thick.

High Resolution Pic of the 4th moon

The System Tag for this system in Spaceengine is RS 1229-169-6-235375-219.

Stormy Night

Picture of the Day - October 20, 2018

Cyclonic storm system dimly lit by a distant sun. Instead of being made of water, this storm and its clouds are made up of dust particles. The planet is a Mars-Like world with a thin carbon dioxide atmosphere and covered in red-colored iron oxide dust

The Core of the Milky-way relative to the apparent size of the moon from Earth

js

Why Won’t Our Parker Solar Probe Melt?

This summer, our Parker Solar Probe will launch to travel closer to the Sun than any mission before it, right into the Sun’s outer atmosphere, the corona.

The environment in the corona is unimaginably hot: The spacecraft will travel through material with temperatures greater than 3 million degrees Fahrenheit. 

So…why won’t it melt? 

The Difference Between Heat and Temperature

Parker Solar Probe was designed from the ground up to keep its instruments safe and cool, but the nature of the corona itself also helps. The key lies in the difference between heat and temperature.

Temperature measures how fast particles are moving, while heat is the total amount of energy that they transfer. The corona is an incredibly thin and tenuous part of the Sun, and there are very few particles there to transfer energy – so while the particles are moving fast (high temperature), they don’t actually transfer much energy to the spacecraft (low heat).

It’s like the difference between putting your hand in a hot oven versus putting it in a pot of boiling water (don’t try this at home!). In the air of the oven, your hand doesn’t get nearly as hot as it would in the much denser water of the boiling pot. 

So even though Parker Solar Probe travels through a region with temperatures of several million degrees, the surface of its heat shield will reach only about 2,500 F.

The Heat Shield

Of course, thousands of degrees Fahrenheit is still way too hot for scientific instruments. (For comparison, lava from volcano eruptions can be anywhere between 1,300 to 2,200 F.) 

To withstand that heat, Parker Solar Probe is outfitted with a cutting-edge heat shield, called the Thermal Protection System. This heat shield is made of a carbon composite foam sandwiched between two carbon plates. The Sun-facing side is covered with a specially-developed white ceramic coating, applied as a plasma spray, to reflect as much heat as possible.

The heat shield is so good at its job that even though the Sun-facing side of the shield will be at 2,500 F, the instruments in its shadow will remain at a balmy 85 F.

Parker Solar Probe Keeps its Cool

Several other designs on the spacecraft help Parker Solar Probe beat the heat. 

Parker Solar Probe is not only studying the Sun – it’s also powered by it. But even though most of the surface area of its solar arrays can be retracted behind the heat shield, even that small exposed segment would quickly make them overheat while at the Sun.  

To keep things cool, Parker Solar Probe circulates a single gallon of water through its solar arrays. The water absorbs heat as it passes behind the arrays, then radiates that heat out into space as it flows into the spacecraft’s radiator. 

It’s also important for Parker Solar Probe to be able to think on its feet, since it takes about eight minutes for information to travel between Earth and the Sun. If we had to control the spacecraft from Earth, by the time we knew something went wrong, it would be too late to fix it. 

So Parker Solar Probe is smart: Along the edges of the heat shield’s shadow are seven sensors. If any of these sensors detect sunlight, they alert the central computer and the spacecraft can correct its position to keep the sensors – and the rest of the instruments – safely protected behind the heat shield.

Over the course of its seven-year mission, Parker Solar Probe will make 24 orbits of our star. On each close approach to the Sun, it will sample the solar wind, study the Sun’s corona, and provide unprecedentedly close up observations from around our star – and armed with its slew of innovative technologies, we know it will keep its cool the whole time. 

Parker Solar Probe launches summer 2018 on its mission to study the Sun. Keep up with the latest on the mission at nasa.gov/solarprobe or follow us on Twitter and Facebook.

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com

O’Sirus System - Post 2 (Weird Life)

The System’s 6th planet, and first world I’ve come across in my journey that has life on the surface. This is one odd life-supporting world. It is a small world, roughly the size of Mars, but only half of Mars’ mass, with a low average density. The atmosphere is 99.8% carbon dioxide and 0.2% oxygen, with a thickness only 4% that of Earth’s atmosphere. The surface has an average temperature of 181 K or -133 °F.  And it has one large moon in orbit.

Unfortunately Space Engine only shows life as coloring on the planet’s surface; therefore, I have no idea what form or appearance it has. Based off of the temperatures and atmospheric composition, this the life likely has has a low metabolic rate that uses a liquid other than just water to metabolize, possibly an Eutectic Water-Ammonia solution. Carbon-based if feasible, but involves significantly different chemistry than we are familiar with. The purple coloring likely an adaptation to utilize the low sunlight levels and probably uses primarily red or near infrared light for photosynthesis.

High Resolution Pics

Picture 1 - Planet and Moon

Picture 2 -

Picture 3 - The Equator

Picture 4 - Northern Ice Cap

Picture 5 - Planet, Moon, Sun, Inner Planets and Andromeda

Picture 6 - The Surface

Picture 7 - Moon and Nebula Rising

Picture of the day - December 11, 2018

Preview picture of the Insight A system. Rocky moon transits across the face of an ice giant.