Space launches

This satellite image from Planet Labs Inc., that has been annotated by experts at the James Martin Center for Nonproliferation Studies at Middlebury Institute of International Studies, shows a fire at a rocket launch pad at the Imam Khomeini Space Center in Iran's Semnan province, Thursday Aug. 29, 2019. The satellite image released Thursday shows the smoldering remains of a rocket at a Iran space center that was to conduct a U.S.-criticized satellite launch. (Planet Labs Inc, Middlebury Institute of International Studies via AP)

This satellite image from Maxar Technologies shows a fire at a rocket launch pad at the Imam Khomeini Space Center in Iran's Semnan province, Thursday, Aug. 29, 2019. Satellite images released Thursday show the smoldering remains of a rocket at a Iran space center that was to conduct a U.S.-criticized satellite launch. (Satellite image ©2019 Maxar Technologies via AP)

This image taken from the Twitter account of President Donald J. Trump, @realDonaldTrump, shows an undated photo of the aftermath of an explosion at Iran's Imam Khomeini Space Center in the country's Semnan province. The explosion Thursday, Aug. 29, 2019, left the smoldering remains of a rocket on a launch pad at the center, which was to conduct a U.S.-criticized satellite launch. In his tweet Friday, Aug. 30, 2019, Trump wrote: "The United States of America was not involved in the catastrophic accident during final launch preparations for the Safir SLV Launch at Semnan Launch Site One in Iran. I wish Iran best wishes and good luck in determining what happened at Site One." (Donald J. Trump Twitter account via AP)

This satellite image from Planet Labs Inc., that has been annotated by experts at the James Martin Center for Nonproliferation Studies at Middlebury Institute of International Studies, shows a fire at a rocket launch pad at the Imam Khomeini Space Center in Iran's Semnan province, Thursday Aug. 29, 2019. The satellite image released Thursday shows the smoldering remains of a rocket at a Iran space center that was to conduct a U.S.-criticized satellite launch. (Planet Labs Inc, Middlebury Institute of International Studies via AP)

A United Launch Alliance Delta IV rocket lifts off from space launch complex 37 at the Cape Canaveral Air Force Station with the second Global Positioning System III payload, Thursday, Aug. 22, 2019, in Cape Canaveral, Fla. (AP Photo/John Raoux)

This Aug. 9, 2019, satellite image from Planet Labs Inc., that has been annotated by experts at the James Martin Center for Nonproliferation Studies at Middlebury Institute of International Studies, shows activity at the Imam Khomeini Space Center in Iran's Semnan province. Iran appears to be preparing to attempt another satellite launch after twice failing this year to put one in orbit, despite U.S. accusations that the Islamic Republic's program helps it develop ballistic missiles. (Planet Labs Inc, Middlebury Institute of International Studies via AP)

A Falcon 9 SpaceX rocket with a resupply mission to the International Space Station lifts off from pad 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla., Thursday, July 25, 2019. (AP Photo/John Raoux)

This photo released by the Indian Space Research Organization (ISRO) shows its Geosynchronous Satellite launch Vehicle (GSLV) MkIII carrying Chandrayaan-2 lift off from Satish Dhawan Space center in Sriharikota, India, Monday, July 22, 2019. India successfully launched an unmanned spacecraft to the far side of the moon on Monday, a week after aborting the mission due to a technical problem. (Indian Space Research Organization via AP)

In this July 20, 1969 photo made available by NASA, astronaut Buzz Aldrin, lunar module pilot, walks on the surface of the moon during the Apollo 11 extravehicular activity. (Neil Armstrong/NASA via AP)