Lesson 5 Discovering the Universe
For years, people have gazed at the sky, wondering about the ____ of the world beyond.
This curiosity has led to the exploration of the universe, ____ as a result, space is no longer an unknown territory.
Since the launch of the first ____ satellite, Sputnik 1, in 1957, the world has witnessed the blossoming of space exploration.
Satellites and Satellite ____
As you look up at the night sky, you may have seen a bright, twinkling star and wondered ____ it was a star or a satellite.
Satellites play ____ vital role in space science, and their development has opened up a new era of space travel and research.
Satellites are machines launched into space that orbit the ____
They gather data from every corner ____ the globe, from wheat fields in Zambia to glaciers in Antarctica.
Once collected, the satellite data are transmitted back to the ground station to be analyzed and turned into ____ information that people can use in their everyday lives.
During this process, the data are reviewed by the ____ before they are sent out to users.
Uses of Satellites
Satellites are used in various fields, ____ as communication, navigation, weather forecasting, scientific research, and Earth observation.
Firstly, ____ data play a crucial role in facilitating global communication by supporting TV signals, radio broadcasts, internet connections, and telephone calls.
Additionally, navigation satellites transmit signals used by the Global ____ System (GPS) to determine the location of objects on Earth.
If you have a GPS receiver, these satellites can help you ____ locate your destination.
____ satellites collect data on weather patterns to provide forecasts.
Satellites are also extensively used for scientific research and experiments that explore the Earth’s atmosphere, other planets, and ____
Satellite data are invaluable for observation and monitoring purposes ____ well.
For example, high-resolution satellite images provide information that is ____ for various purposes, including military surveillance.
And that is ____ all.
In the ____ of agriculture, satellites are useful for enhancing crop management and production.
They monitor crop health and predict crop yields during the harvest ____
It is also known ____ satellite data can help to estimate market sales based on the number of cars in parking lots.
This information helps develop effective marketing strategies ____ make informed decisions for higher profits.
Most importantly, satellite images are used to locate emergency ____
For example, in the event of a disaster, satellite images can help locate blocked roads or ____ buildings, allowing rescuers to find people in time.
Satellites can monitor ____ any part of the globe, identifying, predicting, and managing what is happening around the world.
Challenges in Satellite Technology
The increasing number of satellites launched into orbit has ____ problems, one of which is space debris.
Nearly half of the satellites in ____ are no longer in use.
However, they continue ____ orbit the Earth at high speeds and sometimes collide with other satellites.
These impacts have created up to 1 million pieces of space debris, which can damage satellites already in orbit and pose a threat ____ future space missions.
Another problem is ____ light pollution from satellites.
Enormous numbers of low-flying satellites have been launched into space, and this is ____ to continue.
Although they don’t generate their own light, these satellites and pieces of space debris reflect sunlight, contributing to ____ brightness of the night sky.
It is predicted ____ by 2030, the night sky will be up to 12 percent brighter than its natural darkness.
This means that in the near future we may not be able ____ see the stars anymore.
In addition, the development of satellite ____ is closely tied to unequal access to information.
Some countries lack satellites or the capability to analyze satellite data, while others have launched hundreds ____ them and created a vast pool of information.
Approximately 37 percent of the global population remains unconnected ____ the internet, unable to fully benefit from satellite-based services.
This difference in access results ____ an uneven distribution of satellite information collected from space.
In conclusion, while ____ technology has revolutionized the world, it still has limitations and challenges.
Addressing ____ issues is crucial for building a promising future for space exploration.
The space industry also needs ____ share responsibility and collaborate to properly use satellite technology.
____ then can we ensure an equal distribution of resources and information, benefiting all humans on Earth.
Satellites Launched ____ Korea
____ satellites have been launched in Korea, each with a specific purpose.
The first one was Korea Institute of Technology Satellite-1 (KITSAT-1), which was launched in 1992 ____ scientific research and experimentation.
It is also known as “Our Star ____
The ____ one was KOREASAT-1 in 1995, which was Korea’s first communication satellite.
Since 1999, Korea has launched KOMPSAT-1, for various purposes, and ____ for monitoring weather and the oceans.
Then, ____ 2020, Anasis 2 was launched for military surveillance.
In 2023, ____ and seven other satellites were launched using a domestically developed rocket, Nuri.