Eli5: how do we know the properties of things in space like stars and planets if we’ve never been on them? 930 viewsJanuary 3, 2024 Question90.68K October 2, 2019 0 Comments Eli5: how do we know the properties of things in space like stars and planets if we’ve never been on them? In: Other 5 Answers ActiveNewestOldest Anonymous Posted October 2, 2019 0 Comments Because those same properties exist here. There are lots of way to test a matter. One of which is light. If hydrogen is blue, then the blue light shining off a distance planet or sun implies that it has hydrogen. You are viewing 1 out of 5 answers, click here to view all answers. Register or Login
Latest Answers