Article: Despite the all-in-one rocket ships popular in science fiction stories, going to the moon is a mission best broken into separate parts: achieving low-Earth orbit, transferring from Earth to lunar orbit, landing on the moon, and reversing the steps to return to Earth.  Some science fiction stories that depicted a more realistic approach to going to the moon had astronauts going to an orbiting space station where smaller rockets were docked that would take them to the moon and back to the station. Because the United States was in competition with the Soviet Union, this approach was not adopted; the space stations Skylab, Salyut, and the International Space Station were all put up after Project Apollo had ended. The Apollo project used the three-stage Saturn V rocket. The bottom-most first stage lifted the assembly off the launching pad to a height of 42 miles (68 km), the second stage boosted it almost to low Earth orbit, and the third stage pushed it into orbit and then toward the moon.  The Constellation project proposed by NASA for a return to the moon in 2018 consists of a two different two-stage rockets. There are two different first stage rocket designs: a crew-only lifting stage consisting of a single five-segment rocket booster, the Ares I, and a crew-and-cargo lifting stage consisting of five rocket engines beneath an external fuel tank supplemented by two five-segment solid rocket boosters, the Ares V. The second stage for both versions uses a single-liquid fuel engine. The heavy lifting assembly would carry the lunar orbital capsule and lander, which the astronauts would transfer to when the two rocket systems dock. Because the moon has no atmosphere, you have to bring your own oxygen so you have something to breathe while you’re there, and when you stroll about on the lunar surface you need to be in a spacesuit to protect yourself from the blazing heat of the two-week-long lunar day or the mind-numbing cold of the equally long lunar night – not to mention the radiation and micro-meteoroids the lack of atmosphere exposes the surface to.  You’ll also need to have something to eat. Most of the foods used by the astronauts in space missions have to be freeze-dried and concentrated to reduce their weight and then be reconstituted by adding water when eaten. They also need to be high-protein foods to minimize the amount of body waste generated after eating. (At least you can wash them down with Tang.) Everything you take into space with you adds weight, which increases the amount of fuel necessary to lift it and the rocket carrying it into space, so you won’t be able to take too many personal effects into space – and those lunar rocks will weigh 6 times as much on Earth as they do on the moon. A launch window is the time range for launching the rocket from Earth to be able to land in the desired area of the moon during a time when there would be sufficient light for exploring the landing area. The launch window was actually defined two ways, as a monthly window and a daily window.  The monthly launch window takes advantage of where the planned landing area is with respect to the Earth and the sun. Because Earth’s gravity forces the moon to keep the same side facing Earth, exploration missions were chosen in areas of the Earth-facing side to make radio communication between Earth and the moon possible. The time also had to be chosen at a time when the sun was shining on the landing area. The daily launch window takes advantage of launch conditions, such as the angle at which the spacecraft would be launched, the performance of booster rockets, and the presence of a ship downsite from the launch to track the rocket’s flight progress. Early on, light conditions for launching were important, as daylight made it easier to oversee aborts on the launch pad or before achieving orbit, as well as being able to document aborts with photographs. As NASA gained more practice in overseeing missions, daylight launches were less necessary; Apollo 17 was launched at night.
Question: What is a summary of what this article is about?
Plan to go in stages. Pack for the trip. Determine the launch window.
Article: Go to https://www.youtube.com/account_advanced in your web browser. This will open the advanced settings page for your default channel. If you aren't signed into YouTube, enter your email address and password when prompted. It's in the top-right corner of the window. A drop-down menu will appear. In the drop-down menu, click the name of the channel that you want to delete. It's at the bottom of the page. If you don't see this option, you'll need to delete your channel from your Google Account instead. When prompted, type in the password you use to log into your Google Account, then click NEXT below the password field. It's a heading in the middle of the page. Clicking it causes the heading to expand. This is near the bottom of the page. It's a blue button at the bottom of the page. Doing so prompts a pop-up window. If you're deleting a brand account, you'll type the channel name as specified by the prompt into the text box in the middle of the pop-up window, while you'll enter your email address if you're deleting a main account's channel. It's in the bottom-right corner of the pop-up window. Doing so removes the channel from your account. If you're deleting a primary account's channel, this will remove all content on your account including playlists, uploaded videos, and favorites. You'll still be able to log into and use YouTube with your account once the deletion is complete.
Question: What is a summary of what this article is about?
Open YouTube's advanced settings page. Click your profile icon. Select a channel. Scroll down and click Delete channel. Enter your password. Click I want to permanently delete my content. Check the "The following will be permanently deleted" box. Click DELETE MY CONTENT. Enter your channel name or email address when prompted. Click DELETE MY CONTENT.