Tang Yue and the old cat sat opposite each other, with a pen and paper between the two.

The dim light fell from the top of his head, shining on the faces of one person and one cat, Tang Yue was very serious, and the old cat was also very serious.

"Completely cancel the middle orbit, abandon this 280-kilometer-high circular orbit, and only accelerate once, so that the Eagle spacecraft can jump directly from the parked orbit into the orbit of the space station for rendezvous and docking, is it okay?"

"Okay, but it's risky."

"How big is the risk?"

"Jumping from an altitude of 280 kilometers to 380 kilometers requires one acceleration and one deceleration, which consumes a lot of propellant."

"There's enough propellant left for us to try a few more rendezvous?"

"Zero."

"In other words, no matter what strategy we take, we can only rendezvous and dock once in the end?"

"Yes."

"So which strategy has more propellant left in the end?"

"I need to calculate."

The old cat sat down in a chair, closed his eyes, and began to settle down.

Then it started to smoke.

Half a minute later, the old cat opened its eyes, it picked up a pen and paper, and began to write and draw, "If we abandon the original plan of two intermediate orbits and two orbit changes, and use the strategy of jumping directly into the orbit of the space station, then we will be able to save ten percent of the propellant and four hours of time...... But the operation of jumping directly into the orbit of the space station is more difficult, and it requires remote guidance from the Kunlun station. ”

"Ten percent propellant savings?"

"Ten percent."

Tang Yue immediately clapped his decision, "That's it!" That's Plan B! Let the lander jump straight over! Don't waste a second! Don't burn a single milligram of fuel! Old cat, you are responsible for manipulating and guiding! I'll help you find the signal! ”

Tang Yue inexplicably gained confidence and chose the plan very decisively, the old cat was a little stunned, and said in his heart When did this mourning dog get angry? It didn't know where Tang Yue's excitement came from, it was clearly disheartened and depressed a few minutes ago.

"We're dead." Tang Yue said.

The old cat was stunned and didn't understand what this meant.

"We're dead." Tang Yue repeated, "The launch of the Eagle spacecraft has failed, and Mai Dong will definitely die...... But God has given us another 2.477% chance, can you understand? ”

The old cat immediately understood what Tang Yue meant.

They were never cornered.

Instead, they are in a desperate situation! Tang Yue and the old cat, from the moment the earth disappeared, they were already fighting against the water.

The failure of the Eagle spacecraft to enter orbit should have been a 100 percent, dead end, but a certain powerful rocket engine stubbornly held up the last ray of hope for them.

This is to put oneself to death and live afterward.

"When is the closest window for a change of track?" Tang Yue asked.

"The nearest window of time was five minutes ago." The old cat glanced at the time, "The next time will be in an hour and fifteen minutes." ”

Tang Yue turned around and dragged up the Mingguang armor extravehicular suit, "I'll give you an antenna, leave the signal problem to me, I will definitely let you contact the lander before the next orbit change window arrives!" You go and drive that violent Maozi space tractor and give it a super big drift at apogee! I trust your driving skills...... Akinayama stroller car god! ”

"Don't worry! Tractor, I'll also give you a Lamborghini! Watch me reverse into storage perfectly! The old cat gave a thumbs up, "Good Luck!" ”

Tang Yue put on the Mingguang armor, picked up the antenna, strode out, and shouted: "Dear Comrade RD-0172! The country is big, but we can't take a step back! Because behind us is Moscow! Ula ——! ”

The old cat watched him bend down into the airlock chamber, and suddenly felt that he was not wrong at all that he thought Tang Yue's back was a bear, he not only looked like a bear, but also looked like a hairy bear.

Tang Yue's inexplicable confidence may not only come from the consciousness of being born after death, but also the Russian text on the RD-0172 engine.

Immediately afterwards, there was a long shout from the airlock room.

"Vodka! Davarishi ——! ”

·

·

·

"Dear Mom and Dad, I'm Mai Dong, I'm writing this letter to you on the United Space Station on Mars, I'm fine here......"

Mai Dong was stunned, and pressed the backspace key again to delete all the words.

"Dear Mom and Dad, I'm Mai Dong, when I write this letter, the sun has just risen from the other side of Mars, and the golden sunlight illuminates half of the Crystal module, and the scenery here is really beautiful......

Mai Dong shook his head and deleted all the words written again.

"Dear Mom and Dad, I'm Mai Dong, are you okay? I'm going to die......"

Delete again.

"Dear Mom and Dad, I'm Mai Dong, and I'm going to your side soon......"

Delete again.

Mai Dong typed and deleted again and again, and she felt that every sentence she wrote was inappropriate, from the beginning to the end.

The girl's slender fingers finally stayed on the keyboard, and she fell into a long silence, clearly full of words to say, but when she really wanted to start writing, she was at a loss and didn't know where to put the pen, just like if you have a lot of words to talk to someone, look up and look around, but suddenly find that the world is vast, and you are alone.

Mai Dong sat in a chair with a seat belt strapped to her body, and she stared straight at the computer screen, the cursor flickering second by second.

Mai Dong has written a lot of articles since she was a child, and writing has always been her forte, but in this girl, she has never written a suicide note, let alone a living person to write a suicide note for the deceased, the earth has disappeared, her parents, family, friends and colleagues are long gone, she writes a suicide note here, who can she leave to?

But she still wanted to leave something behind the world.

Mai Dong didn't know if Tang Yue and Lao Mao could really make the Eagle spacecraft successfully send supplies, but at this moment, a sandstorm was breaking out on the Kunlun station, and the contact was interrupted, even if Mai Dong was not a professional flight expert, she also knew the difficulty, and the hope of success was very slim, if the Eagle spacecraft failed to rendezvous and dock with the United Space Station, then she would die.

Mai Dong had to finish this matter while he still had a little strength to finish a letter in its entirety.

But where do you send the letter after it's written?

Mai Dong's eyes fell on the control panel, densely packed with complex buttons and switches.

Using the communication system on the space station, can this letter be converted into an electromagnetic signal and sent to the vast depths of space?

Like the last cry of the last person in the universe, Mai Dong doesn't know how far the radio waves emitted by the space station can travel, due to the existence of the interstellar extinction effect, the cosmic dust in the vacuum has an absorption effect on electromagnetic radiation, and the radio waves will accelerate and decay with the increase of distance, and finally weaken to the point where they cannot carry any information.

But this distance must be very, very long, and this lonely beam of radio waves will take the girl's last words and fly in the vast vacuum for hundreds of millions of years.

It's lonely to think about.

If there is anything loneliest in this world, it must be the last beam of radio waves sent by human beings, carrying a language that no one in the universe can understand, from birth to death, running to a distant place that never ends.

So leave this letter on the space station?

A few years after his death, the Joint Space Station ran out of life and crashed into the atmosphere, leaving the letters to burn with the station and scattered to ashes on the vast plains of Mars?

Mai Dong sighed faintly and hugged himself tightly.

As the last person on the Union Space Station, she wanted to write a letter, but she didn't know who to leave it to.

The universe is so big, but there is no place for letters.