# What are the 2 factors affecting the apparent magnitude?

## What are the 2 factors affecting the apparent magnitude?

The apparent brightness of a star depends on both its luminosity and its distance from Earth. Thus, the determination of apparent brightness and measurement of the distance to a star provide enough information to calculate its luminosity.

What three factors determine a star’s apparent magnitude?

Three factors control the brightness of a star as seen from Earth: how big it is, how hot it is, and how far away it is. Magnitude is the measure of a star’s brightness. Apparent magnitude is how bright a star appears when viewed from Earth.

### How is apparent magnitude measured?

The apparent magnitude of a celestial object, such as a star or galaxy, is the brightness measured by an observer at a specific distance from the object. The smaller the distance between the observer and object, the greater the apparent brightness. (left) Two stars, A and B, with the same apparent magnitude.

Which stellar properties does luminosity depend on?

In fact, there is a nice relationship between the luminosity of a star and its temperature, but it also depends on the size. You can imagine that for two stars with the same temperature, but different sizes, the bigger star is going to be more luminous.

## What are the five stellar properties?

The Properties of Stars

• BRIGHTNESS. This is not a fundamental property, but a combination of the luminosity and distance to a star (and in some cases also dependent on the amount of absorption in the direction of a star).
• DISTANCE. From trigonometric and spectroscopic parallaxes.
• LUMINOSITY.
• CHEMICAL COMPOSITION.
• TEMPERATURE.

What color is the hottest star?

Blue stars

### Are all stars white?

All stars are white because they emit all wavelengths. Having said that their temperatures mean that they will have a bluer or redder tint, so their spectral class will be red, orange, yellow, yellow-white, white blue-white and blue (Classes M (orC&S), K, G, F, A, B & O).

What are the 7 spectral classes of stars?

Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M.

## What is the name of the coolest star?

According to a new study, a star discovered 75 light-years away is no warmer than a freshly brewed cup of coffee. Dubbed CFBDSIR 1458 10b, the star is what’s called a brown dwarf.

What is the most beautiful star?

Betelgeuse Star

### What classification of stars is the coolest?

The spectral sequence is also a colour sequence: the O- and B-type stars are intrinsically the bluest and hottest; the M-, R-, N-, and S-type stars are the reddest and coolest.

Is there anything older than the universe?

Our Sun is about 4.5 billion years old. Since HD 140283 is a Population II star, it is older. In fact, it is the oldest star with a well-determined age. Because of this, astronomers colloquially call the star βthe Methuselah star.β Initial estimates of its age were in excess of 14 billion years.

## What’s the oldest star in the sky?

SMSS J031300. HE 1523-0901 is the oldest known star in our galaxy, the Milky Way. The star’s estimated age is about 13.2 billion years. In 2007, Anna Frebel used the European Southern Observatory (ESO)’s Very Large Telescope (VLT) to look for stars in our galaxy that were thought to be old.

Are older stars hotter?

The answer to this question goes like an intricate detective story. Scientists can deduce the age of a star by its brightness and color. stars, which in turn are brighter than red stars. are hotter are also brighter.

### What is the closest star to Earth?

Proxima Centauri

Do any visible stars have planets?

The vast majority of stars in our Milky Way galaxy host planets, many of which may be capable of supporting life as we know it, a new study suggests. Astronomers have detected eight new exoplanet candidates circling nearby red dwarf stars, which make up at least 75 percent of the galaxy’s 100 billion or so stars.

## Is Earth a star?

Earth orbits our Sun, a star. Earth is the third planet from the Sun at a distance of about 93 million miles (150 million km).

Is each star a galaxy?

OXON HILL, MARYLAND, United States, EARTH, SOLAR SYSTEM, MILKY WAYWhen we look up, every star we see is in the Milky Way, the spiral galaxy we call home. Our galactic home is one of trillions of galaxies in the universe.

### What exoplanet is most like Earth?

Kepler-452b

Is there a super Earth?

Super-Earths β a class of planets unlike any in our solar system β are more massive than Earth yet lighter than ice giants like Neptune and Uranus, and can be made of gas, rock or a combination of both. They are between twice the size of Earth and up to 10 times its mass.

## Is there a planet made of diamond?

In 2012, scientists announced they had discovered an exoplanet twice the size of Earth believed to be made largely of diamond. Astronomers said the rocky planet, called 55 Cancri e, was likely covered in graphite and diamond, rather than water and granite.

What is the largest rocky planet in the universe?

The roasted world known as TOI-849b is the most massive rocky planet ever observed, with as much as 40 Earths’ worth of material crammed inside. Perplexingly, TOI-849b’s tremendous bulk suggests that it should be a giant, gassy world like Jupiter, yet it has almost no atmosphere.

### What is the 9th planet called?

Planet X

Has Planet 9 Been Found?

As of June 2021, no observation of Planet Nine had been announced. While sky surveys such as Wide-field Infrared Survey Explorer (WISE) and Pan-STARRS did not detect Planet Nine, they have not ruled out the existence of a Neptune-diameter object in the outer Solar System.

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