Level 1 - Absolute Beginner

NASA is the United States space agency. They build telescopes that go into space to look at distant stars and planets. A new telescope called the Nancy Grace Roman Space Telescope is now ready to be launched.

The telescope will travel to a special place in space called L2. From there, it can look very far into the universe without clouds or weather getting in the way. It will take pictures of things that are very difficult to see from Earth.

The rocket that will carry the telescope is called the Falcon Heavy. It will launch on August 30, 2026. Scientists hope the Roman Space Telescope will help them learn more about space, including planets around other stars.

telescope

a tool used to look at very distant objects, especially in space

launch

to send a rocket or spacecraft into space

universe

all of space and everything in it, including stars, planets, and galaxies

planet

a large round object in space that orbits around a star

rocket

a vehicle that uses powerful engines to travel into space

scientist

a person who studies and learns about the world and universe through research

orbit

to travel in a circular path around something in space

agency

an organization of the government that has a special job to do

Level 2 - Elementary

NASA's Nancy Grace Roman Space Telescope has completed its final assembly and is scheduled to launch on August 30, 2026. The telescope will be carried into space on a SpaceX Falcon Heavy rocket from Kennedy Space Center in Florida. It will travel to the Sun-Earth Lagrange 2 point, the same location as the James Webb Space Telescope, about 1.5 million kilometres from Earth.

The Roman Telescope has a wide-field camera that can photograph a large area of sky at once. Scientists plan to use it to search for exoplanets, which are planets orbiting stars outside our solar system. It may discover more than 100,000 new exoplanets using a technique called gravitational microlensing.

The telescope is named after Nancy Grace Roman, who was NASA's first Chief of Astronomy from 1959 to 1979. She played an important role in creating the Hubble Space Telescope. The Roman Space Telescope has been built 8 months ahead of schedule and under budget, which is unusual for large space missions.

assembly

the process of putting together the parts of a machine or structure

exoplanet

a planet that orbits a star outside our own solar system

gravitational microlensing

a method of detecting planets using the way gravity bends the light from a distant star

Lagrange point

a special location in space where the gravitational forces of two large bodies allow a smaller object to remain in a stable position

wide-field camera

a camera that can photograph a very large area of sky in a single image

solar system

the Sun and all the planets, moons, and other objects that orbit it

technique

a particular way of doing something

budget

the amount of money available to spend on a project

Level 3 - Intermediate

NASA's Nancy Grace Roman Space Telescope cleared its final integration review on June 20, 2026, confirming an August 30 launch window aboard a SpaceX Falcon Heavy from Launch Complex 39A at Kennedy Space Center. The telescope will be placed at the Sun-Earth L2 Lagrange point approximately 1.5 million kilometres from Earth, sharing the orbital neighbourhood with the James Webb Space Telescope. Completing integration 8 months ahead of the original baseline schedule and within budget, Roman represents a significant project-management success for NASA after several years of cost overruns and delays on flagship missions.

Roman's primary science payload is a 2.4-metre primary mirror paired with a wide-field instrument capable of imaging 100 times the sky area of the Hubble Space Telescope in each exposure. Its principal survey programmes include a High Latitude Wide Area Survey designed to map dark energy through weak gravitational lensing and baryon acoustic oscillations, and a Galactic Bulge Time Domain Survey targeting more than 100,000 exoplanet detections via gravitational microlensing. A coronagraph instrument aboard the telescope will serve as a technology demonstrator for direct imaging of exoplanets, a capability critical to future mission concepts.

The telescope is named after Nancy Grace Roman, who from 1959 to 1979 served as NASA's first Chief of Astronomy and championed the development of space-based observatories at a time when large mirrors in orbit were considered technologically implausible. Her institutional advocacy laid the groundwork for the Hubble Space Telescope programme. If the launch proceeds on August 30, the telescope is expected to begin science operations by early 2027.

integration review

a formal inspection process confirming that all components of a spacecraft have been assembled correctly and are ready for launch

coronagraph

a device that blocks the bright light of a star to allow observation of fainter nearby objects, such as planets

weak gravitational lensing

a technique that measures the subtle distortion of distant galaxy shapes caused by intervening dark matter

baryon acoustic oscillations

regular patterns in the distribution of ordinary matter in the universe that are used as a standard ruler to measure cosmic distances and dark energy

wide-field instrument

a telescope camera designed to capture a very large area of sky in a single observation

technology demonstrator

a component included in a mission specifically to test a new capability for use in future missions

implausible

not seeming reasonable or probable; difficult to believe at the time

flagship mission

the most important and prominent project within a programme, typically receiving the greatest investment and attention

Level 4 - Advanced

NASA's Nancy Grace Roman Space Telescope passed its Observatory-level integration review on June 20, 2026, authorising the August 30 launch window on a SpaceX Falcon Heavy from LC-39A, Kennedy Space Center. Insertion into a halo orbit around the Sun-Earth L2 Lagrange point will position the telescope 1.5 million kilometres from Earth in a thermally stable environment shielded from solar radiation, a configuration it will share with JWST. Completing integration 8 months ahead of the Cost and Schedule Management baseline and within the $4.3 billion congressionally appropriated cap represents a meaningful reversal of the pattern of flagship science mission overruns that characterised earlier schedules.

Roman's science architecture centres on a 2.4-metre f/8 Cassegrain telescope feeding a 288-megapixel focal plane array with a 0.28 square-degree field of view, 100 times Hubble's instantaneous field. Its two core surveys are the High Latitude Wide Area Survey, which will constrain the dark energy equation-of-state parameter w through weak gravitational lensing two-point correlation functions and baryon acoustic oscillation measurements across roughly 2,000 square degrees, and the Galactic Bulge Time Domain Survey, targeting approximately 54,000 continuous days of photometric monitoring to detect more than 100,000 planetary microlensing events. The Coronagraph Instrument will attempt contrast ratios of 10^-9 in reflected starlight, a capability roughly 1,000 times beyond current ground-based coronagraphy and essential to the science case for a future large infrared and optical space telescope.

Roman's namesake, Nancy Grace Roman, served as the first Chief of Astronomy at NASA Headquarters from 1959 to 1979, where she navigated significant institutional resistance to fund space-based ultraviolet observatories and ultimately provided the programmatic foundation for what became Hubble. Her career illustrates the intersection of scientific advocacy and programme management that defines successful flagship missions. If the August 30 launch proceeds without anomaly, Roman is projected to enter nominal science operations in March 2027, at which point its data will be made publicly available under an open-access policy within 18 months of acquisition, ensuring broad community engagement with one of the most capable wide-field observatories ever deployed.

halo orbit

a periodic three-dimensional orbit around a Lagrange point that does not encircle any physical body

Cassegrain telescope

a reflecting telescope design using a concave primary mirror and a convex secondary mirror to focus light

focal plane array

a grid of light-sensitive detectors at the focus of a telescope, functioning as the digital camera sensor

dark energy equation-of-state parameter w

a number describing how the pressure of dark energy relates to its density, where w = -1 corresponds to a cosmological constant