Speeding star offers a rare glimpse of the Milky Way's galactic centre
Cosmic Mapmaker: NASA’s SPHEREx Space Telescope Ready to Launch
6 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater) Ahead of launch, NASA’s SPHEREx is enclosed in a payload fairing at Vandenberg Space Force Base on March 2. The observatory is stacked atop the four small satellites that make up the agency’s PUNCH mission.NASA/BAE Systems/Benjamin Fry
NASA’s latest space observatory is targeting a March 8 liftoff, and the agency’s PUNCH heliophysics mission is sharing a ride. Here’s what to expect during launch and beyond.
In a little over a day, NASA’s SPHEREx space telescope is slated to launch from Vandenberg Space Force Base in California aboard a SpaceX Falcon 9 rocket. The observatory will map the entire celestial sky four times in two years, creating a 3D map of over 450 million galaxies. In doing so, the mission will provide insight into what happened a fraction of a second after the big bang, in addition to searching interstellar dust for the ingredients of life, and measuring the collective glow from all galaxies, including ones that other telescopes cannot easily detect.
The launch window opens at 7:09:56 p.m. PST on Saturday, March 8, with a target launch time of 7:10:12 p.m. PST. Additional opportunities occur in the following days.
Launching together into low Earth orbit, NASA’s SPHEREx and PUNCH missions will study a range of topics from the early universe to our nearest star. NASA/JPL-CaltechSharing a ride with SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer) is NASA’s PUNCH (Polarimeter to Unify the Corona and Heliosphere), a constellation of four small satellites that will map the region where the Sun’s outer atmosphere, the corona, transitions to the solar wind, the constant outflow of material from the Sun.
For the latest on PUNCH, visit the blog:
What SPHEREx Will Do
The SPHEREx observatory detects infrared light — wavelengths slightly longer than what the human eye can see that are emitted by warm objects including stars and galaxies. Using a technique called spectroscopy, SPHEREx will separate the infrared light emitted by hundreds of millions of stars and galaxies into 102 individual colors — the same way a prism splits sunlight into a rainbow. Observing those colors separately can reveal various properties of objects, including their composition and, in the case of galaxies, their distance from Earth. No other all-sky survey has performed spectroscopy in so many wavelengths and on so many sources.
The mission’s all-sky spectroscopic map can be used for a wide variety of science investigations. In particular, SPHEREx has its sights set on a phenomenon called inflation, which caused the universe to expand a trillion-trillionfold in a fraction of a second after the big bang. This nearly instantaneous event left an impression on the large-scale distribution of matter in the universe. The mission will map the distribution of more than 450 million galaxies to improve scientists’ understanding of the physics behind this extreme cosmic event.
SPHEREx Fact SheetAdditionally, the space telescope will measure the total glow from all galaxies, including ones that other telescopes cannot easily detect. When combined with studies of individual galaxies by other telescopes, the measurement of this overall glow will provide a more complete picture of how the light output from galaxies has changed over the universe’s history.
At the same time, spectroscopy will allow SPHEREx to seek out frozen water, carbon dioxide, and other key ingredients for life. The mission will provide an unprecedented survey of the location and abundance of these icy compounds in our galaxy, giving researchers better insight into the interstellar chemistry that set the stage for life.
Launch SequenceBut, first, SPHEREx has to get into space. Prelaunch testing is complete on the spacecraft’s various systems, and it’s been encapsulated in the protective nose cone, or payload fairing, atop the SpaceX Falcon 9 rocket that will get it there from Vandenberg’s Space Launch Complex-4 East.
NASA’s SPHEREx mission will lift off from Space Launch Complex-4 East at Vanden-berg Space Force Base in California aboard a SpaceX Falcon 9 rocket, just as the Sur-face Water and Ocean Topography mission, shown here, did in December 2022. NASA/Keegan Barber
A little more than two minutes after the Falcon 9 lifts off, the main engine will cut off. Shortly after, the rocket’s first and second stages will separate, followed by second-stage engine start. The reusable first stage will then begin its automated boost-back burn to the launch site for a propulsive landing.
Once the rocket is out of Earth’s atmosphere, about three minutes after launch, the payload fairing that surrounds the spacecraft will separate into two halves and fall back to Earth, landing in the ocean. Roughly 41 minutes after launch, SPHEREx will separate from the rocket and start its internal systems so that it can point its solar panel to the Sun. After this happens, the spacecraft can establish communications with ground controllers at NASA’s Jet Propulsion Laboratory in Southern California, which manages the mission for the agency. This milestone, called acquisition of signal, should happen about three minutes after separation.
About 52 minutes after liftoff, PUNCH should separate as well from the Falcon 9.
Both spacecraft will be in a Sun-synchronous low Earth orbit, where their position relative to the Sun remains the same throughout the year. Each approximately 98-minute orbit allows the SPHEREx telescope to view a 360-degree strip of the celestial sky. As Earth’s orbit around the Sun progresses, that strip slowly advances, enabling SPHEREx to image almost the entire sky in six months. For PUNCH, the orbit provides a clear view in all directions around the Sun.
About four days after launch, SPHEREx should eject the protective cover over its telescope lens. The observatory will begin science operations a little over a month after launch, once the telescope has cooled down to its operating temperature and the mission team has completed a series of checks.
NASA’s Launch Services Program, based out of the agency’s Kennedy Space Center in Florida, is providing the launch service for SPHEREx and PUNCH.
For more information about the SPHEREx mission, visit:
https://www.jpl.nasa.gov/missions/spherex
More About SPHERExSPHEREx is managed by NASA JPL for the agency’s Astrophysics Division within the Science Mission Directorate at NASA Headquarters in Washington. BAE Systems (formerly Ball Aerospace) built the telescope and the spacecraft bus. The science analysis of the SPHEREx data will be conducted by a team of scientists located at 10 institutions in the U.S., two in South Korea, and one in Taiwan. Data will be processed and archived at IPAC at Caltech, which manages JPL for NASA. The mission’s principal investigator is based at Caltech with a joint JPL appointment. The SPHEREx dataset will be publicly available at the NASA-IPAC Infrared Science Archive.
Get the SPHEREx Press Kit How to Watch March 8 SPHEREx Launch 6 Things to Know About SPHEREx Why NASA’s SPHEREx Will Make ‘Most Colorful’ Cosmic Map Ever NASA’s SPHEREX Space Telescope Will Seek Life’s Ingredients News Media ContactsKaren Fox / Alise Fisher
NASA Headquarters, Washington
202-358-1600 / 202-358-2546
karen.c.fox@nasa.gov / alise.m.fisher@nasa.gov
Calla Cofield, SPHEREx
Jet Propulsion Laboratory, Pasadena, Calif.
626-808-2469
calla.e.cofield@jpl.nasa.gov
Sarah Frazier, PUNCH
Goddard Space Flight Center, Greenbelt, Md.
202-853-7191
sarah.frazier@nasa.gov
2025-033
Share Details Last Updated Mar 07, 2025 Related Terms- SPHEREx (Spectro-Photometer for the History of the Universe and Ices Explorer)
- Astrophysics
- Exoplanets
- Galaxies
- Heliophysics
- Jet Propulsion Laboratory
- Polarimeter to Unify the Corona and Heliosphere (PUNCH)
- The Big Bang
- The Milky Way
- The Search for Life
- The Sun
- The Universe
This NASA/ESA Hubble Space Telescope image of a vibrant spiral galaxy called NGC 5042 resides…
Article 9 hours ago 5 min read NASA Turns Off 2 Voyager Science Instruments to Extend Mission Article 2 days ago Keep Exploring Discover Related TopicsGas trapped in rocks gives snapshots of ancient atmosphere
Finally, stars made from only primordial gas?
Two huge black holes merged into one and went flying across the cosmos
Unknown fate of ice-hunting Moon missions leaves scientists in suspense
Nature, Published online: 07 March 2025; doi:10.1038/d41586-025-00719-7
The Athena lander seems to be in the wrong orientation ― but some of its science might be salvaged.Eye problems cloud NASA’s vision of Mars
Nature, Published online: 05 March 2025; doi:10.1038/d41586-025-00654-7
Mysterious syndrome remains a ‘red risk’ for long-term spaceflight.AI algorithm helps telescopes to pivot fast towards gravitational-wave sources
Nature, Published online: 05 March 2025; doi:10.1038/d41586-025-00543-z
Fast electromagnetic follow-up observations of gravitational-wave sources such as binary neutron stars could shed light on questions across physics and cosmology. A machine-learning approach brings that a step closer.Real-time inference for binary neutron star mergers using machine learning
Nature, Published online: 05 March 2025; doi:10.1038/s41586-025-08593-z
Analysis of gravitational waves from merging binary neutron stars was accelerated using machine learning, enabling full low-latency parameter estimation and enhancing the potential for multi-messenger observations.How AI could let us watch epic star collisions in real time
Nature, Published online: 05 March 2025; doi:10.1038/d41586-025-00690-3
Locating sources of gravitational waves using artificial intelligence could enable astronomers to point telescopes at stellar mergers before they happen.The cosmic landscape of time that explains our universe's expansion
The first water may have formed surprisingly soon after the big bang
The solar system was once engulfed by a vast wave of gas and dust
Seven planets to be visible in night sky for last time until 2040
Private spacecraft nails Moon landing: first images of Blue Ghost on the lunar surface
Nature, Published online: 03 March 2025; doi:10.1038/d41586-025-00670-7
The touchdown is a much-needed win for NASA’s partnerships with commercial space companies.Blue Ghost spacecraft makes second-ever commercial landing on the moon
The asteroid hits and near-misses you never hear about
Touchdown! Carrying NASA Science, Firefly’s Blue Ghost Lands on Moon
Carrying a suite of NASA science and technology, Firefly Aerospace’s Blue Ghost Mission 1 successfully landed at 3:34 a.m. EST on Sunday near a volcanic feature called Mons Latreille within Mare Crisium, a more than 300-mile-wide basin located in the northeast quadrant of the Moon’s near side.
The Blue Ghost lander is in an upright and stable configuration, and the successful Moon delivery is part of NASA’s CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign. This is the first CLPS delivery for Firefly, and their first Moon landing.
The 10 NASA science and technology instruments aboard the lander will operate on the lunar surface for approximately one lunar day, or about 14 Earth days.
“This incredible achievement demonstrates how NASA and American companies are leading the way in space exploration for the benefit of all,” said NASA acting Administrator Janet Petro. “We have already learned many lessons – and the technological and science demonstrations onboard Firefly’s Blue Ghost Mission 1 will improve our ability to not only discover more science, but to ensure the safety of our spacecraft instruments for future human exploration – both in the short term and long term.”
Since launching from NASA’s Kennedy Space Center in Florida on Jan. 15, Blue Ghost traveled more than 2.8 million miles, downlinked more than 27 GB of data, and supported several science operations. This included signal tracking from the Global Navigation Satellite System (GNSS) at a record-breaking distance of 246,000 miles with the Lunar GNSS Receiver Experiment payload – showing NASA can use the same positioning systems on Earth when at the Moon. Science conducted during the journey also included radiation tolerant computing through the Van Allen Belts with the Radiation-Tolerant Computer System payload and measurements of magnetic field changes in space with the Lunar Magnetotelluric Sounder payload.
“The science and technology we send to the Moon now helps prepare the way for future NASA exploration and long-term human presence to inspire the world for generations to come,” said Nicky Fox, associate administrator for science at NASA Headquarters in Washington. “We’re sending these payloads by working with American companies – which supports a growing lunar economy.”
During surface operations, the NASA instruments will test and demonstrate lunar subsurface drilling technology, regolith sample collection capabilities, global navigation satellite system abilities, radiation tolerant computing, and lunar dust mitigation methods. The data captured will benefit humanity by providing insights into how space weather and other cosmic forces impact Earth.
Before payload operations conclude, teams will aim to capture imagery of the lunar sunset and how lunar dust reacts to solar influences during lunar dusk conditions, a phenomenon first documented by former NASA astronaut Eugene Cernan on Apollo 17. Following the lunar sunset, the lander will operate for several hours into the lunar night.
“On behalf of our entire team, I want to thank NASA for entrusting Firefly as their lunar delivery provider,” said Jason Kim, CEO of Firefly Aerospace. “Blue Ghost’s successful Moon landing has laid the groundwork for the future of commercial exploration across cislunar space. We’re now looking forward to more than 14 days of surface operations to unlock even more science data that will have a substantial impact on future missions to the Moon and Mars.”
To date, five vendors have been awarded 11 lunar deliveries under CLPS and are sending more than 50 instruments to various locations on the Moon, including the lunar South Pole. Existing CLPS contracts are indefinite-delivery, indefinite-quantity contracts with a cumulative maximum contract value of $2.6 billion through 2028.
Learn more about NASA’s CLPS initiative at:
-end-
Amber Jacobson / Karen Fox
Headquarters, Washington
202-358-1600
amber.c.jacobson@nasa.gov / karen.c.fox@nasa.gov
Natalia Riusech / Nilufar Ramji
Johnson Space Center, Houston
281-483-5111
nataila.s.riusech@nasa.gov / nilufar.ramji@nasa.gov
Antonia Jaramillo
Kennedy Space Center, Florida
321-501-8425
antonia.jaramillobotero@nasa.gov