The International Space Station: A Complete Guide for 2026

The International Space Station (ISS) is the largest structure humans have ever built in space, a football-field-sized laboratory orbiting Earth at 17,500 mph, completing one full orbit every 90 minutes. Since November 2, 2000, when the first crew arrived, the ISS has been continuously inhabited for over 25 years, the longest unbroken human presence in space in history.

But the ISS is entering its final chapter. NASA has confirmed a target decommission date of 2030, and a new generation of commercial space stations is being developed to take its place. Here is everything you need to know about the ISS in 2026: its current operations, scientific achievements, future plans, and how you can track it yourself.

ISS by the Numbers

• Mass: ~420,000 kg (925,000 lbs), the heaviest human-made object in orbit
• Length: 109 meters (357 feet) end-to-end, including solar arrays
• Habitable volume: 388 cubic meters, roughly equivalent to a Boeing 747
• Orbital altitude: ~408 km (253 miles) in low Earth orbit
• Speed: 7.66 km/s (17,150 mph)
• Orbital period: ~92 minutes per orbit, completing 15.5 orbits per day
• Solar array wingspan: 73 meters, larger than a Boeing 777 wingspan
• Power generation: 75-90 kilowatts from 8 solar array wings
• Crew capacity: Typically 6-7 astronauts (can support up to 13 during handovers)
• Cost to build: ~$150 billion (most expensive object ever constructed)
• Nations involved: 15 countries across 5 space agencies (NASA, Roscosmos, ESA, JAXA, CSA)

Current Status in 2026

As of early 2026, the ISS remains fully operational. The station currently hosts a crew of astronauts and cosmonauts conducting hundreds of experiments across disciplines including biology, physics, Earth science, and technology development. Recent crew rotations have been handled primarily by SpaceX Crew Dragon spacecraft, with Russian Soyuz vehicles continuing to ferry cosmonauts.

The station's hardware is aging but functional. NASA has invested in critical maintenance, including new solar arrays (iROSA: ISS Roll-Out Solar Arrays) that have been incrementally deployed since 2021 to augment the original arrays. The station's atmosphere, water recycling, and life support systems continue to operate, though some components have required creative engineering solutions to extend their service life.

Recent Highlights

• Axiom Space missions: Private astronaut missions (Ax-1 through Ax-4) have demonstrated commercial crew operations to the ISS, paving the way for Axiom's own commercial station module
• SpaceX Crew rotations: Regular Crew Dragon missions (Crew-9, Crew-10, and beyond) maintain a steady rotation of NASA, ESA, and JAXA astronauts
• Boeing Starliner: After significant delays and the uncrewed return controversy in 2024, Starliner's path to operational crew rotations remains a key storyline in 2026
• Scientific output: Over 3,000 experiments have been conducted aboard the ISS, with research results published in thousands of peer-reviewed papers

Modules and Structure

The ISS is a modular structure assembled in orbit over more than a decade. Key modules include:

U.S. Segment

• Unity (Node 1): The first U.S. module, serving as a connecting hub between the Russian and American segments
• Destiny (U.S. Laboratory): The primary American research laboratory, housing experiment racks across multiple disciplines
• Harmony (Node 2): The forward node connecting the U.S., European, and Japanese labs, and serving as the primary docking port for crew vehicles
• Tranquility (Node 3): Houses the life support systems (water recycling, oxygen generation) and the Cupola observation module
• Cupola: The iconic seven-windowed observation dome, providing panoramic views of Earth and used for robotic arm operations
• Columbus (ESA): The European research laboratory
• Kibo (JAXA): The Japanese Experiment Module, the largest pressurized module on the ISS

Russian Segment

• Zarya (FGB): The first ISS module launched in 1998 originally provided propulsion and power
• Zvezda (Service Module): The main Russian living quarters, providing life support, navigation, and propulsion
• Nauka (Multipurpose Laboratory Module): Added in 2021 after years of delays, providing additional lab space, a European robotic arm, and an airlock
• Prichal (Node Module): A small docking hub attached to Nauka, providing additional ports for visiting vehicles

Daily Life on the ISS

Astronauts on the ISS follow a tightly scheduled routine:

• Wake up: 6:00 AM GMT, morning hygiene, breakfast, and daily planning conference with ground teams in Houston, Moscow, and other partner centers
• Work day: ~6.5 hours of science experiments, station maintenance, and EVA (spacewalk) preparation
• Exercise: 2 hours per day mandatory, using the COLBERT treadmill, CEVIS cycle ergometer, and ARED resistance device to combat bone and muscle loss in microgravity
• Meals: Rehydratable foods, thermostabilized pouches, and occasional fresh food deliveries from cargo resupply missions
• Sleep: Astronauts sleep in personal crew quarters (phone-booth-sized pods) in sleeping bags tethered to the wall, experiencing 16 sunrises and sunsets per day

Major Scientific Achievements

The ISS has produced groundbreaking research that would be impossible on Earth:

• Protein crystal growth: Microgravity enables larger, more perfect protein crystals, advancing drug design for diseases including Duchenne muscular dystrophy and cancer
• Cold Atom Laboratory: Created the coldest spot in the known universe (billionths of a degree above absolute zero), enabling studies of quantum behavior
• Twins Study: Compared astronaut Scott Kelly (1 year in space) with his identical twin Mark on Earth, revealing insights into how spaceflight affects gene expression, telomere length, and the immune system
• CASIS research: The ISS National Lab has hosted experiments from hundreds of commercial, academic, and government organizations
• Earth observation: The station's orbit provides continuous observation of Earth's climate, weather patterns, and natural disasters from a unique vantage point
• Technology demonstrations: The ISS has served as a testbed for life support systems, robotics, and materials that will be needed for lunar and Mars missions

The Decommission Plan

NASA plans to deorbit the ISS around 2030 using a purpose-built deorbit vehicle. SpaceX was awarded a $843 million contract in June 2024 to develop the U.S. Deorbit Vehicle (USDV), a modified Dragon spacecraft that will guide the 420-ton station to a controlled reentry over the uninhabited South Pacific Ocean, the spacecraft cemetery known as Point Nemo, the most remote location on Earth's surface.

The deorbit sequence will be carefully choreographed:

1. Final crew departs the station
2. USDV docks and performs a series of deorbit burns
3. The ISS enters the atmosphere and breaks apart during reentry
4. Surviving debris impacts the ocean at Point Nemo

Russia has indicated it may detach its segment before deorbit to form the core of a new Russian orbital station (ROSS), though the technical and political feasibility of this plan remains uncertain.

Commercial Successors

NASA's Commercial LEO Destinations (CLD) program is funding the development of commercial space stations to replace the ISS:

• Axiom Space: Building modules that will initially attach to the ISS before detaching to form a standalone commercial station. Axiom has completed multiple private astronaut missions and is the furthest along in hardware development.
• Vast: Developing the Haven-1 single-module station (targeting 2025-2026 launch) and the larger Haven-2 multi-module station. Vast raised $400M in 2026, signaling strong investor confidence.
• Blue Origin / Orbital Reef: A partnership between Blue Origin and Sierra Space to build a mixed-use business park in orbit, offering research, manufacturing, and tourism capabilities.
• Starlab (Voyager Space + Airbus): A single-launch station with inflatable habitat technology, targeting a George Washington Bridge-sized pressurized volume.

NASA has committed to purchasing services from these commercial stations (crew time, research access, and logistics), providing an anchor customer that de-risks the business models for station operators.

How to See the ISS

The ISS is the third-brightest object in the night sky (after the Sun and Moon), visible to the naked eye as a bright, steady light moving smoothly across the sky. Here's how to spot it:

• NASA Spot the Station: spotthestation.nasa.gov, sign up for email/SMS alerts for visible passes over your location
• Best conditions: The ISS is visible at dawn and dusk when it's in sunlight but the ground is in shadow. Passes last 2-6 minutes.
• What to look for: A bright, white, non-blinking light moving steadily from west to east across the sky, much faster than an airplane
• Photography: A camera on a tripod with a long exposure (10-30 seconds) will capture the ISS as a bright streak across the star field

Track the ISS on SpaceNexus

SpaceNexus provides real-time tracking of the International Space Station and all major space stations. Our Space Station Tracker shows the ISS's current position, orbital parameters, upcoming crew rotations, and scheduled cargo resupply missions. Combined with our Satellite Tracker, you can monitor the ISS alongside the thousands of other spacecraft sharing low Earth orbit.

Track the ISS and Space Stations on SpaceNexus