Sirius
You can only see yourself in Google Earth if you were in a photo that they took. If you where, then you can see it in any version.
See related links for lots of "secrets" and interesting places found in Google Earth.Also try searching for "secrets google earth" in any search engine (like Google) and you'll see lots of hits.If you mean "secret" or hidden features in Google Earth (also known as "easter eggs") then see related questions.
Google Maps does not provide the historical imagery view feature that is available in Google Earth. To see past imagery you must use Google Earth. See related details in link below.
People can see where you live...
You can see the White House in Google Earth both in the base map imagery and well as a 3-D building replica. To see the 3-D you must have 3-D layer checked.
There are no stars in the Earth. For the biggest star in the Universe, see the related question.
The sun is the biggest star in space. This star is so big that we can see it from Earth. Without it we would be living in darkness.
It's the closest star because, It's the biggest star we can see, and the bigger it is the closer it is.
You can be anywhere on Earth as long as you are facing the direction of Venus. It will be the brightest "star" in the sky and also the biggest.
Google Earth
You can only see yourself in Google Earth if you were in a photo that they took. If you where, then you can see it in any version.
First you download Google Earth from google's web site. You can start by entering an address (or just a city name) in the fly-to-search panel and see Google Earth zoom to that location. Next check out the Google Earth user's guide (which includes video tutorials) and see what else Google Earth can do. See related links below.
Multiple questions. See related questions.
You see it during the day, the Sun is a star and it is the nearest star to Earth.
You can start by entering an address (or just a city name) in the fly-to search panel and see Google Earth zoom to that location. Next check out the Google Earth user's guide (which includes video tutorials) and see what else Google Earth can do.
The Google Earth plugin is free. It can be downloaded with the free version of Google Earth (they're bundled together) or by itself from Google's website (see link below).UPDATE: Google Earth Plugin has been deprecated as of December 12th, 2014.
The closest star to the Earth is the Sun. See related question.