Explore the Universe: Current Space Research and Missions

Right now, humans and robots are actively exploring space in ways that would have seemed impossible just a few decades ago. You are living during one of the most exciting periods in the history of space research, with missions reaching Mars, the outer solar system, and even beyond.

Space exploration connects directly to what you have already learned about Celestial Bodies, Planets, Moons, and Asteroids and Orbital Patterns and Planet and Moon Movements. Understanding those foundations helps you make sense of where spacecraft travel and why.

Mars Exploration

NASA's Perseverance rover landed in Jezero Crater on Mars on February 18, 2021. Its main goal is to study whether Mars ever had conditions that could support ancient microbial life. Scientists chose Mars because evidence shows it once had liquid water flowing on its surface.

Traveling with Perseverance was Ingenuity, a small robotic helicopter that became the first aircraft to achieve powered flight on another planet, proving that flight is possible in Mars's thin atmosphere.

The Curiosity rover has been exploring Mars since 2012, studying the planet's geology and climate. It has found strong evidence that Mars once had liquid water, making it a key mission in the search for past life.

The James Webb Space Telescope

Launched on December 25, 2021, the James Webb Space Telescope (JWST) is NASA's most powerful space telescope ever built. It detects infrared light, which allows it to see through cosmic dust and observe light from the earliest galaxies formed after the Big Bang. You might wonder why it is positioned so far from Earth it sits about 1.5 million kilometers away at a point called L2, where heat and light from the Sun, Earth, and Moon cannot interfere with its sensitive sensors.

Space telescopes like JWST capture much clearer images than ground-based telescopes because they are above Earth's atmosphere, which normally blurs and absorbs light. This connects to what you have studied about Space Technology, Exploration and Observation Tools.

The Voyager 1 Spacecraft

Launched in 1977, Voyager 1 is the first human-made object to reach interstellar space the region beyond our solar system. It has been operating for over 45 years and continues to send scientific data back to Earth. Instead of solar panels, it uses nuclear batteries called radioisotope thermoelectric generators (RTGs), which produce electricity from radioactive decay. NASA's Deep Space Network of powerful ground antennas can detect Voyager's weak signals from beyond our solar system.

The International Space Station (ISS)

The International Space Station (ISS) is a large spacecraft that orbits Earth and serves as a science laboratory where astronauts from many nations conduct experiments. These experiments help scientists learn about living in space, human health, and Earth's environment. Astronauts on the ISS experience microgravity because the station and everything inside it are constantly falling toward Earth while also moving forward fast enough to keep orbiting a state called free fall.

The Artemis Program

NASA's Artemis program is designed to return humans to the Moon, including the first woman, for the first time since 1972. As part of this effort, NASA is planning to build the Lunar Gateway, a small space station that will orbit the Moon and serve as a staging point for astronauts traveling to and from the lunar surface.

SpaceX and Private Space Exploration

SpaceX, founded by Elon Musk, developed the Falcon 9 rocket and Crew Dragon spacecraft, which NASA uses to transport astronauts to the ISS. SpaceX revolutionized space travel by developing reusable rocket boosters that land themselves after launch, greatly reducing the cost of reaching space.

The DART Mission

In 2022, NASA's DART (Double Asteroid Redirection Test) mission intentionally crashed a spacecraft into an asteroid called Dimorphos to test whether the impact could change the asteroid's orbit. This was a test of planetary defense technology to protect Earth from future asteroid threats.

Satellite: A satellite is any object that orbits a larger body in space. You use the word satellite to describe both natural objects like the Moon and human-made devices that orbit Earth to collect data, provide communication signals, and observe weather patterns.

Astronaut: An astronaut is a specially trained human who lives and works beyond Earth's atmosphere. Astronauts travel to space aboard rockets and spacecraft, conducting experiments and performing spacewalks.

Rover: A rover is a wheeled robotic vehicle designed to travel across the surface of a planet or moon and collect data and samples. NASA's rovers like Curiosity and Perseverance drive across Mars to study rocks, soil, and weather.

Telescope: A telescope is an instrument that gathers light or other forms of radiation to let scientists study objects far away in space. Space telescopes like Hubble and JWST are above Earth's atmosphere, allowing them to capture much clearer and more detailed images than ground-based telescopes.

Rocket: A rocket uses thrust the force produced by burning fuel and expelling gases to escape Earth's gravity. Most powerful rockets use liquid hydrogen as fuel combined with liquid oxygen as the oxidizer.

Space Station: A space station, like the International Space Station (ISS), remains in orbit so crews can live there for months. It serves as a laboratory for scientific research in microgravity conditions.

Probe: A probe is a robotic spacecraft sent on long journeys to study distant worlds. Examples include Voyager 1 and New Horizons, which have traveled to the outer solar system and beyond.

Lander: A lander is a spacecraft that touches down on a planetary surface to measure conditions up close. Mars landers, for example, study the soil, atmosphere, and geology of Mars directly from the surface.

Launch Pad: A launch pad is the ground facility where a rocket is assembled, fueled, and launched into space.

Orbit: An orbit is the curved, repeating path that one object takes as it travels around another object due to gravity. For example, the Moon orbits Earth, and Earth orbits the Sun.

Microgravity: Microgravity describes the very weak gravity experienced while in orbit. On the ISS, everything aboard is in free fall together, making objects seem to float. There is no true zero gravity gravity still exists everywhere in space.

Spacewalk (EVA): A spacewalk, officially called an Extravehicular Activity (EVA), occurs when an astronaut leaves the spacecraft and works in the vacuum of space, usually to repair equipment or conduct experiments. Astronauts wear special pressurized suits to survive outside.

Exoplanet: An exoplanet is any planet that orbits a star other than our Sun, meaning it exists in a different star system beyond our solar system. Scientists search for exoplanets hoping to find worlds that could support life.

Interstellar Space: Interstellar space is the region beyond our solar system, outside the boundary of the Sun's influence. Voyager 1 became the first human-made object to enter this region in 2012.

Heat Shield: A heat shield protects a spacecraft from burning up during reentry into Earth's atmosphere. When a spacecraft reenters at extreme speeds, friction with air molecules generates temperatures that can reach thousands of degrees, and the heat shield absorbs and dissipates this intense heat.

Launch Window: A launch window is the specific period of time when conditions such as the positions of Earth and the destination planet are ideal for launching a spacecraft so it uses the least amount of fuel and arrives correctly.

Mission Control: Mission control is a team of engineers, scientists, and flight directors located on the ground who communicate with astronauts, monitor all spacecraft systems, and make decisions to keep the mission safe and on track.

Booster: A rocket booster is attached to the main rocket to provide extra thrust during liftoff and the early stages of flight when the most power is needed to escape Earth's gravity. Once the fuel is used up, the boosters separate and fall away.

Every space mission you read about relies on the science skills you have been building. Scientists use Data Collection with Quantitative and Qualitative Data to analyze readings from rovers and telescopes. They apply Experimental Design with Multiple Variables and Controls when planning missions and interpreting results.

Space engineers also use the Design Cycle and Problem-Solving Methodology to build spacecraft that must work perfectly in extreme conditions. Understanding Systems Thinking and Interconnected Components helps you see how every part of a spacecraft from the heat shield to the solar panels must work together as a system.

You can also connect space exploration to Scientific Models, Creating and Using Models, since scientists build models of planetary systems and spacecraft trajectories to plan missions before they launch.

Before exploring current space missions, you built important foundations. Your knowledge of Celestial Bodies, Planets, Moons, and Asteroids helps you understand where missions are headed and why. Your understanding of Orbital Patterns and Planet and Moon Movements explains how spacecraft travel through the solar system using gravity.

You also learned about Space Technology, Exploration and Observation Tools, which introduced you to the basic instruments scientists use now you can see those tools in action in real missions.

As you explore space research, you will find it connects to many other important science topics. Understanding Exploration Tools, Satellites and Space Probes gives you a deeper look at the specific instruments used in the missions you have studied here. You can also explore Gravity Effects and Gravitational Forces in Space to understand why orbits work the way they do and why astronauts experience microgravity on the ISS.

The movement of planets and moons you studied in Planetary Motion, Orbits and Rotations directly explains how scientists calculate launch windows and spacecraft trajectories. Your skills in Scientific Models, Creating and Testing Predictive Models and Data Collection, Precision and Accuracy in Measurements are exactly what real space scientists use every day.

You will also apply what you know about Experimental Variables, Identifying and Controlling Multiple Variables when you analyze how mission scientists design experiments aboard the ISS. The Design Process and Engineering Methodology and Testing and Evaluation, Performance Assessment topics show you how spacecraft are engineered and tested before launch.

This topic prepares you for two exciting next steps: Space Technology, Satellites and Exploration, where you will go deeper into how satellites work, and Universe Structure, Galaxies and Solar Systems, where you will zoom out to understand the vast scale of the universe that space missions are helping us explore.