Oral route. Many drugs can be administered orally as liquids, capsules, tablets, or chewable tablets. Because the oral route is the most convenient and usually the safest and least expensive, it is the one most often used. However, it has limitations because of the way a drug typically moves through the digestive tract.
Measuring Distances to Stars. Astronomers use several techniques for discovering how far away an object is. The first is called trigonometric parallax and is based on geometry, but it is only good for up to about 500 light-years.
Report Abuse. All stars are different in distance and the closest is 4 light years away, that means if you pointed a red laser light at it, it would take 4 years for that light to reach that star, if the sun died suddenly it would take 8 minutes for us to realize this since the sun is 8 light minutes away from us.