Chapter 404 (1/2)
On earth, people use mobile phones to make phone calls and send QQ and wechat messages over the wireless network. It seems that they are absolutely timely. They only need to wait for problems such as network speed when transmitting files.
But that doesn't mean it's really real-time.
The communication between people is a signal running, and the essence of the signal is electromagnetic wave. The transmission speed of electromagnetic wave signal is the speed of light. In front of the speed of light, the distance on the earth is very small. Even the communication across an ocean can sound like face-to-face communication without delay, That little bit of electromagnetic wave signal takes time to run, which can not even be felt by human fragile sensory organs.
However, not on a starry scale.
What happened one light year away came to the earth with information and was observed by people. This time takes a whole year. In other words, if two people talk across a light-year, and the two people talk at the same time, the two sides of the conversation must wait a year to hear what the other party says, and it will take another year to hear the reply again, unless quantum or hyperspace communication technology is used, This technology may be applied to the information transmission between the stars, but it is difficult to be applied to the exploration of space.
Therefore, although the fleet has mastered certain quantum communication technology, it can not be applied to the exploration of interstellar space. Therefore, the astronomical observation and investigation of the earth will be greatly limited.
This transition fluctuation was discovered 17 billion light-years away, and the information feedback was received four days ago, that is, the last day of the previous year, the day before the first spacecraft of Bilin appeared.
Of course, we should take into account the concept of space we just talked about. Light carrying information runs over 17 billion light-years to the earth in at least 14 to 15 days.
In other words, the nearest neighbor star appeared in the outer ring space of the solar system at least 18 days ago!
They... Have already arrived.
When presenting the data, each Observatory has already checked to determine that they are not the ghost ship fleet that entered the solar system from the direction of neighbor star.
Combined with the above, the biggest problem at present is
Where is the nearest star fleet now?
They arrived in the outer space of the solar system 18 days ago, and did not disturb any monitoring network under the extraterrestrial space fleet in these 18 days. Then they may appear anywhere!
Su ran felt a cold chill rising from his back.
It's still too short, too short.
He has only space to arrange the defense line of the earth and the moon, and outer space can only barely take care of a little.
It is impossible for a few years or even decades to really make the whole solar system spread all over its ”eyes”, because the area is too large and there are all kinds of stars. It is not easy to make space like an iron bucket.
Fortunately, this cold feeling of ice was soon completely expelled by Su ran. He took a deep breath and said: ”it was conveyed to all countries and observatories. I hope they can continue to search based on this discovery, and try to find their traces whether they can or not.”
The nearest star fleet is very careful. At least according to the current feedback information, the transition 17 billion light-years away from the earth is their last transition, because closer is the region of the solar system. It is obvious that they are deliberately ”hiding” themselves, and as long as they want to hide and enter a silent state, With the earth's pure telescope observation level, it is almost impossible to find them, but Su ran will not give up any details, even if it knows that it is almost impossible to find them by observation.