The heat shield is built to withstand radiation equivalent to up to about 500 times the Sun's radiation on Earth.
The car-sized probe is created to give scientists a better understanding of solar wind and geomagnetic storms that risk wreaking chaos on Earth by knocking out the power grid.
The launch was pushed back because a technical glitch on the rocket carrying the probe, United Launch Alliance's Delta IV Heavy rocket, caused NASA to run out the clock on its 65-minute launch window Saturday.
According to NASA, the forecast shows a 60 percent chance of favourable weather conditions for launch.
The probe is set to use seven Venus flybys over almost seven years to gradually reduce its orbit around the Sun, using instruments created to image the solar wind and study electric and magnetic fields, coronal plasma and energetic particles.
The probe, the size of a small auto, is due to make a seven-year mission to skim through the sun's atmosphere, enduring temperatures of 1,300C.
Parker's lightweight heat shield is just 4 ½ inches (11 centimeters) thick. The outreaching corona is hundreds of times hotter than the sun's actual surface, confounding scientists.
"We'll be going where no spacecraft has dared go before - within the corona of a star", said project scientist Nicky Fox from Johns Hopkins University Applied Physics Laboratory.
News Corp heralds digital on way to $US1.4b loss
News Corp said net loss available to shareholders narrowed to $372 million in the fourth quarter from $430 million a year earlier. Total revenue surged 30 percent to $2.69 billion, above estimates of $2.65 billion.
It is created to withstand heat of up to 1,000 degrees Celsius, speeds of 700,000 kilometres per hour and a journey that will last seven years.
"We are ready. We have the flawless payload".
"The primary science goals for the mission are to trace how energy and heat move through the solar corona and to explore what accelerates the solar wind as well as solar energetic particles", explained NASA. Vindication came with NASA's Mariner 2 spacecraft in 1962.
Parker said he was "impressed" by the Parker Solar Probe, calling it "a very complex machine".
When it nears the Sun, the probe will travel rapidly enough to go from NY to Tokyo in one minute - some 430,000 miles per hour, making it the fastest human-made object.
Ikea opens its first Indian store in Hyderabad
Its first showroom will display more than 7,500 of its products, of which 1,000 will sell for less than 200 rupees ($2.91) apiece. At the Hyderabad store, it now has 8 female forklift drivers and has recruited around 100 girls from the DISHA pilot project.
Erdogan warns Turkey's partnership with US 'in jeopardy'
The lira has always been falling on worries about Erdogan's influence over monetary policy and worsening relations with the US. Investors in Turkey are also anxious about President Erdogan's interference in the country's central bank.
Gary Neville reacts to Paul Pogba's 'weird' penalty
The France playmaker then continued to impress as the first half wore on at Old Trafford , leading his team-mates by example. With seven minutes remaining, he flicked the ball past a defender before sending a low left-footed strike into the net.
Tesla shares fall 5 percent amid news of expansive SEC probe
Musk and SoftBank held unsuccessful talks about a take-private deal in April 2017, according to a source familiar with the matter. Securities and Exchange Commission has since begun to make its own inquiries to check the veracity of Musk's controversial tweet.
Man Utd ace Pogba: I don't care about money
He got that from his team's display at Old Trafford, from the way they started so well to how they saw the game out at the end. Even tonight, I know I can be better and that is what I want to keep showing the manager.
Hurricane Hector to pass just south of Hawaii
Hector's strongest winds are confined to about 40 miles from the eye and are not expected to affect the island. Hawaii County officials declared a precautionary state of emergency ahead of the storm.
Look up: Perseid meteor shower peaks this weekend
Friday and Saturday night, where visitors can look through the telescope to view Jupiter, Saturn, Mars, and potentially Venus. No special equipment is needed, but if you want the best view, it helps to be as far from artificial light as possible.