NASA and SpaceX are preparing for an exciting dual-mission launch on March 6, aiming to reveal the secrets of the universe and the mysteries of the sun. NASA and SpaceX have once again postponed the launch of the SPHEREx and PUNCH missions. They are now aiming to launch no earlier than Thursday, March 6. The additional time will allow the team to complete final vehicle preparations and pre-launch inspections. (The previous launch was March 4, and before that March 2 and February 28).

Technicians and engineers encapsulate NASA's SPHEREx (Spectrophotometer for Cosmic History, Reionization Era and Ice Explorer) observatory and PUNCH (Polar Coordinate Instrument for Unified Coronal and Heliospheric Instrument) satellites inside payload protective fairings Thursday, Feb. 27, 2025, at the Astrotech Space Operations Facility at Vandenberg Air Force Base, California.

Liftoff is scheduled for 10:09 PM ET (7:09 PM PST) from Space Launch Complex 4 East (SLC-4E) at Vandenberg Air Force Base, California.

The pre-launch press conference is now scheduled for Wednesday, March 5 at 3:30 p.m. and will be broadcast live on NASA+.

The SPHEREx observatory is based on a wide-field aluminum telescope. The optics are passively cooled by radiating heat into space using a 3-stage V-groove system. A series of three nested conical photon shields protect the cooler and optics from solar and terrestrial radiation. Source: NASA

The SPHEREx (Spectrophotometer for Cosmic History, Reionization Epochs, and Ice Explorers) mission is a groundbreaking NASA space telescope mission designed to study the origins of the universe, the formation of galaxies, and the potential ingredients for life in our own galaxy.

Using advanced infrared spectroscopy technology, SPHEREx will conduct an all-sky survey to map the universe in unprecedented detail. Scientists hope to gain new insights into what happened in the first seconds after the Big Bang, a critical period that shaped the universe as we know it. The mission will also analyze the distribution of water and organic molecules in the interstellar medium (the raw material of planetary systems), helping to determine how these key building blocks of life may have spread across the galaxy.

By surveying billions of galaxies, SPHEREx will provide important data about the large-scale structure of the universe and help refine models of cosmic inflation, the rapid expansion that occurred immediately after the Big Bang. With its ability to detect faint infrared signals, the mission promises to answer fundamental questions about the evolution of galaxies and the conditions required for life beyond Earth.

An artist's concept shows four satellites of NASA's PUNCH mission observing the Sun's outer atmosphere, the corona. Source: Southwest Research Institute

The PUNCH (Polar Coordinate Unified Coronal and Heliosphere) mission is designed to study the Sun's outer atmosphere (corona) and how it extends into space to form the solar wind - the stream of charged particles that affects the entire solar system.

PUNCH consists of four small satellites working together as a distributed observatory that will continuously capture high-resolution images of the corona and its transition to the heliosphere, the giant bubble of charged particles that envelopes the solar system. This will allow scientists to better understand how solar material moves through space, especially during coronal mass ejections (CMEs) - powerful bursts from the sun that can affect satellites, power grids and space travel.

By studying how the corona evolves into the solar wind, PUNCH will help improve space weather forecasts, which are critical to protecting astronauts and technology from the sun's potentially damaging activity. The mission will also provide new insights into how the Sun's dynamic outer layers influence planetary atmospheres and the space environment throughout the solar system.

With its unique ability to track the solar wind in real time, PUNCH will play a key role in expanding our understanding of how the Sun interacts with the space around it and affects planets - including Earth.

Compiled from /ScitechDaily