Saturday morning's launch at Cape Canaveral, Florida, was scrubbed a minute and 55 seconds before blast-off after a gaseous helium alarm went off. The next launch window opens at 3:31 am (0731 UTC) on Sunday.
The probe is named after Gene Parker, who in 1958 wrote a paper theorizing the expansion of the solar atmosphere and solar wind.
The probe will fly through the sun's corona to gather data on the sun's great mysteries, such as the solar winds that create aurorae on Earth and disrupt satellites and power grids. But four minutes before that, NASA announced a "no-go" as the probe team investigated an issue.
It is protected by an ultra-powerful heat shield that can endure unprecedented levels of heat, and radiation 500 times that experienced on Earth.
Scientists also hope the probe can help them to answer why the corona, the outermost layer of the sun's atmosphere, is 300 times hotter than its surface.
A $1.5 billion Parker Solar Probe mission will fly through the sun's outer atmosphere within 6.4 million km of the huge hot star repeatedly, gathering key insights about solar structure, activity, atmosphere, solar winds and other features.
To handle the heat it has been covered with a special 4.5 inch (11.3 cm) thick carbon-composite shield capable of withstanding temperatures up to 1,650C (3,002F).
If all works as planned, the inside of the spacecraft should stay at just 85 degrees Fahrenheit.
The goal for the Parker Solar Probe is to make 24 passes through the corona during its seven-year mission.
"We are ready. We have the flawless payload". The launch window for the mission now closes on August 23.
Scientists have wanted to build a spacecraft like this for more than 60 years, but only in recent years did the heat shield technology advance enough to be capable of protecting sensitive instruments, according to Fox.
"Parker Solar Probe uses Venus to adjust its course and slow down in order to put the spacecraft on the best trajectory", said Driesman.
"And last but not least, we have a white light imager that is taking images of the atmosphere right in front of the Sun".